New Group Of Participants Research Articles

Identifying app components that promote physical activity: a group concept mapping study.

Digital interventions are a promising avenue to promote physical activity in healthy adults. Current practices recommend to include end-users early on in the development process. This study focuses on the wishes and needs of users regarding an a mobile health (mHealth) application that promotes physical activity in healthy adults, and on the differences between participants who do or do not meet the World Health Organization's recommendation of an equivalent of 150 minutes of moderate intensity physical activity. We used a mixed-method design called Group Concept Mapping. In a first phase, we collected statements completing the prompt "In an app that helps me move more, I would like to see/ do/ learn the following…" during four brainstorming sessions with physically inactive individuals (n=19). The resulting 90 statements were then sorted and rated by a new group of participants (n=46). Sorting data was aggregated, and (dis)similarity matrices were created using multidimensional scaling. Hierarchical clustering was applied using Ward's method. Analyses were carried out for the entire group, a subgroup of active participants and a subgroup of inactive participants. Explorative analyses further investigated ratings of the clusters as a function of activity level, gender, age and education. Six clusters of statements were identified, namely 'Ease-of-use and Self-monitoring', 'Technical Aspects and Advertisement', 'Personalised Information and Support', 'Motivational Aspects', 'Goal setting, goal review and rewards', and 'Social Features'. The cluster 'Ease-of-use and Self-monitoring' was rated highest in the overall group and the active subgroup, whereas the cluster 'Technical Aspects and Advertisement' was scored as most relevant in the inactive subgroup. For all groups, the cluster 'Social Features' was scored the lowest. Explorative analysis revealed minor between-group differences. The present study identified priorities of users for an mHealth application that promotes physical activity. First, the application should be user-friendly and accessible. Second, the application should provide personalized support and information. Third, users should be able to monitor their behaviour and compare their current activity to their past performance. Fourth, users should be provided autonomy within the app, such as over which and how many notifications they would like to receive, and whether or not they want to engage with social features. These priorities can serve as guiding principles for developing mHealth applications to promote physical activity in the general population.

Prototypes of Hate and Expectations of the Model Victim.

This research explored the content of hate crime prototypes in a North American context, with particular attention to how such prototypes might influence blame attributions. In Study 1a, participants were recruited from a blended sample of universities (n = 110) and community members (n = 102) and asked to report their thoughts about typical hate crime offenses, victims, and offenders. These open-ended responses were coded, and common themes were identified. In Study 1b, a new group of participants (n = 290) were presented with these themes and asked to rate each for their characteristics of hate crimes. Studies 1a and 1b confirmed the presence of a clear prototype of hate crimes, such that (a) perpetrators were believed to be lower status White men with clear expressions of bias, (b) hate crime offenses were believed to be acts of interpersonal violence accompanied by slurs or verbal abuse, and (c) hate crime victims were thought to be members of a marginalized group who remain passive during the offense. Study 2 explored the consequences of victim prototypes on assessments of victim blame. Participants (n = 296) were recruited from York University and presented with a case vignette that varied the prototypicality of a victim of hate, depicting him as either Black or White and either passive, verbally responsive, or physically confrontational in the context of an assault. Participants showed greatest sympathy for the Black victim who passively ignored verbal harassment but increasingly assigned blame when the Black victim spoke or reacted physically. When the victim was White, participants showed little variation in their assessment of blame as a function of the victim's behavior. These results suggest that Black victims are subjected to greater behavioral scrutiny than White victims and that sympathy for victims of hate may be contingent on their passivity in the face of harassment.

User elicited gesture-based locomotion techniques for immersive VEs in a seated position: a comparative evaluation

Locomotion is a fundamental task for exploring and interacting in virtual environments (VEs), and numerous locomotion techniques have been developed to improve the perceived realism and efficiency of movement in VEs. Gesture-based locomotion techniques have emerged as a more natural and intuitive mode of interaction than controller-based methods of travel in VEs. In this paper, we investigate the intuitiveness, comfort, ease of use, performance, presence, simulation sickness, and user preference of three user-elicited body-based gestures: the Calling gesture, Deictic Pointing gesture, and Mirror Leaning gesture. These gestures are intended to be used in three different seated multitasking scenarios involving virtual travel and various levels of hand engagement in selection. In the first study, participants compared the Calling gesture with the Tapping and Teleportation gestures for Scenario 1, which involved virtual travel only. The Calling gesture was found to be the most intuitive, with increased presence, while the Teleportation gesture was the preferred travel technique. The second study involved participants comparing the Deictic Pointing gesture with the Tapping and Teleportation gestures for Scenario 2, which involved virtual travel and one hand engaged in selection. The Deictic Pointing gesture was found to be more intuitive than the other gestures in terms of performance, comfort, ease of use, and presence. The third study introduced a new group of participants who compared the Mirror Leaning gesture with the Tapping and Teleportation gestures for Scenario 3, which involved virtual travel and both hands engaged in selection. The Mirror Leaning gesture was found to be the most intuitive, with increased presence and performance compared to the other gestures. We compared the gestures of the scenarios in three complementary search tasks: traveling in a straight-line path, moving in a directed path, and moving in an undirected path. We believe that the qualitative and quantitative measures obtained from our studies will help researchers and interaction design experts to design efficient and effective gesture-based locomotion techniques for traveling in a seated position in multitasking VEs.

Texture term usage and hedonic ratings in two age-diverse cohorts of Americans.

This study explores the use of food texture terms by adults in the northeastern United States. The purpose of the study was to compare the effect of food texture on food liking and texture term usage among age groups via two complementary online surveys that differed in the specific task given to participants. Survey 1 gathered common food items associated with 25 texture terms using open-ended questions from 345 participants (45% men, 55% women; age range = 20-79 years); it also collected liking scores for foods with these textures. Next, a new group of participants (n = 349, 46% men, 54% women; age range = 20-79 years) completed Survey 2, which asked them to match up to three texture terms to 32 different foods drawn from Survey 1, using a provided list of 35 texture terms. "Tough," "Chalky," and "Rubbery" had a negative impact on food liking scores while "Tender," "Juicy," and "Crispy" were associated with higher mean food liking scores. "Soft," "Crunchy," "Crispy," "Juicy," and "Greasy" were commonly used texture terms regardless of age. Within those aged 50-79 years, "Smooth," "Tender," "Crunchy," "Soft," "Moist," "Crispy," and "Creamy" were used more often while "Chalky," "Rough," "Mealy," "Foamy/Airy," "Gritty" were used less often. Our results identified commonly used texture terms and revealed differential usage in older and younger adults. These data deepen our understanding of the texture of foods in the modern food environment, highlightinghow texture perception may vary with age.

The effect of food and acid-reducing agents on the pharmacokinetic profile of capivasertib: Results from a randomised, cross-over study.

This two-part, adaptive study assessed the effect of food and an acid-reducing agent (rabeprazole) on the pharmacokinetics (PK) and safety of capivasertib, a potent AKT inhibitor, in clinical development for cancer treatment. In Part 1, healthy participants (n=24) were randomised to receive single-dose capivasertib after overnight fasting, a high-fat, high-calorie meal and with rabeprazole post-overnight fasting in one of six treatment sequences. Based on Part 1 results, a new group of participants (n=24) were randomised (Part 2) to receive capivasertib after overnight fasting, a low-fat, low-calorie meal and modified fasting (food restricted from 2 hours before dosing to 1 hour post-dose) in one of six treatment sequences. Blood samples were collected for PK analyses. Following a high-fat, high-calorie meal, capivasertib exposure increased versus overnight fasting (geometric mean ratio [GMR 90% CI]: area under the concentration-time curve [AUCinf ] 1.32 [1.22, 1.43]; maximum concentration [Cmax ] 1.23 [1.08, 1.41]), but was comparable to that post-modified fasting (GMR: AUCinf 1.13 [0.99, 1.29]; Cmax 0.85 [0.70, 1.04]). AUCinf was similar and Cmax was lower with/without rabeprazole (GMR: AUCinf 0.94 [0.87, 1.02]); Cmax 0.73 [0.64, 0.84]). Capivasertib exposure was similar after a low-fat, low-calorie meal versus overnight fasting (GMR: AUCinf 1.14 [1.05, 1.25]; Cmax 1.21 [0.99, 1.48]) or modified fasting (GMR: AUCinf 0.96 [0.88, 1.05]; Cmax 0.86 [0.70, 1.06]). Safety was consistent with that in larger trials. This study demonstrates that administering capivasertib with food or acid-reducing agents does not lead to clinically relevant PK or safety profile changes.

Development of a Concept Inventory on Open and Transparent Research Practices

Over the past decade psychology researchers have begun adopting practices that promote openness and transparency. While these practices are increasingly reflected in undergraduate psychology curricula, pedagogical research has not systematically examined whether instruction on open science practices improves students’ conceptual understanding of research methods. We developed the Open Science Concept Inventory (OSCI) to evaluate the impact of integrating open science practices into research methods courses. First, we created a set of hypothetical dilemmas related to a range of open science concepts and elicited open-ended responses from undergraduates (N = 64, Study 1). Based on the responses, we created a 40-item multiple-choice questionnaire, which we administered to a new group of participants (N = 262, Study 2) and used item response theory to select 33 items for the final OSCI. Finally, in two implementation rounds across two semesters (Study 3, total N = 37), we evaluated students’ learning gains with the OSCI in a pre-test/post-test design. The implementation rounds involved new materials on open science for a psychology research methods course, including video lectures that situated questionable research practices in the current norms of science and introduced emerging solutions. After excluding extremely fast survey responders, an exploratory analysis showed learning gains among students who expended appropriate effort when completing the OSCI. By systematically evaluating a tool that is easily integrated into existing curricula, we aim to facilitate the adoption of open science practices in undergraduate instruction and the assessment of students’ conceptual foundations for conducting robust and transparent research.

Gender, Attachment Patterns, and Mental Representations of Parents and Self as Predictors of Young Adolescents’ Trauma Symptoms

ABSTRACT While gender and attachment quality have been related to trauma symptomatology in young adolescents, another factor possibly related to trauma symptoms is quality of mental representations of close relationships. In this study, 109 eighth grade students ages 12–13 (44% female) were recruited from a private middle school for academically advantaged, ethnically diverse students over the course of four years, with each new group of participants providing data in the fall semester of their eighth grade year. Participants reported trauma symptoms and the affective valence of their mental representations of self and parents; school staff reported on participants’ attachment patterns. Significant negative correlations existed between preoccupied attachment and affective valence of parental and self mental representations as well as significant positive correlations between incoherent/disorganized and preoccupied attachment, respectively, and childhood trauma symptoms. Overall, incoherent/disorganized attachment predicted avoidance and hyperarousal symptoms, while preoccupied attachment predicted reexperiencing symptoms. For girls, incoherent/disorganized attachment and negative affective valence of self mental representations were both predictive of childhood trauma symptoms, while preoccupied attachment predicted reexperiencing symptoms. These results indicate that therapists must take into account the quality of both attachment and mental representations for middle schoolers when treating childhood trauma symptoms.

Development and Evaluation of a Sound-Swapped Video Database for Misophonia.

Misophonia has been characterized as intense negative reactions to specific trigger sounds (often orofacial sounds like chewing, sniffling, or slurping). However, recent research suggests high-level, contextual, and multisensory factors are also involved. We recently demonstrated that neurotypicals’ negative reactions to aversive sounds (e.g., nails scratching a chalkboard) are attenuated when the sounds are synced with positive attributable video sources (PAVS; e.g., tearing a piece of paper). To assess whether this effect generalizes to misophonic triggers, we developed a Sound-Swapped Video (SSV) database for use in misophonia research. In Study 1, we created a set of 39 video clips depicting common trigger sounds (original video sources, OVS) and a corresponding set of 39 PAVS temporally synchronized with the OVS videos. In Study 2, participants (N = 34) rated the 39 PAVS videos for their audiovisual match and pleasantness. We selected the 20 PAVS videos with best match scores for use in Study 3. In Study 3, a new group of participants (n = 102) observed the 20 selected PAVS and 20 corresponding OVS and judged the pleasantness or unpleasantness of each sound in the two contexts accompanying each video. Afterward, participants completed the Misophonia Questionnaire (MQ). The results of Study 3 show a robust attenuating effect of PAVS videos on the reported unpleasantness of trigger sounds: trigger sounds were rated as significantly less unpleasant when paired with PAVS with than OVS. Moreover, this attenuating effect was present in nearly every participant (99 out of 102) regardless of their score on the MQ. In fact, we found a moderate positive correlation between the PAVS-OVS difference and misophonia severity scores. Overall our results provide validation that the SSV database is a useful stimulus database to study how misophonic responses can be modulated by visual contexts. Here, we release the SSV database with the best 18 PAVS and 18 OVS videos used in Study 3 along with aggregate ratings of audio-video match and pleasantness (https://osf.io/3ysfh/). We also provide detailed instructions on how to produce these videos, with the hope that this database grows and improves through collaborations with the community of misophonia researchers.

Metacognitive judgements of change detection predict change blindness

People tend to think they are not susceptible to change blindness and overestimate their ability to detect salient changes in scenes. Yet, despite their overconfidence, are individuals aware of and able to assess the relative difficulty of such changes? Here, we investigated whether participants' judgements of their ability to detect changes predicted their own change blindness. In Experiment 1, participants completed a standard change blindness task in which they viewed alternating versions of scenes until they detected what changed between the versions. Then, 6 to 7 months later, the same participants viewed the two versions and rated how likely they would be to spot the change. We found that changes rated as more likely to be spotted were detected faster than changes rated as more unlikely to be spotted. These metacognitive judgements continued to predict change blindness when accounting for low-level image properties (i.e., change size and eccentricity). In Experiment 2, we used likelihood ratings from a new group of participants to predict change blindness durations from Experiment 1. We found that there was no advantage to using participants' own metacognitive judgements compared to those from the new group to predict change blindness duration, suggesting that differences among images (rather among individuals) contribute the most to change blindness. Finally, in Experiment 3, we investigated whether metacognitive judgements are based on the semantic similarity between the versions of the scene. One group of participants described the two versions of the scenes, and an independent group rated the similarity between the descriptions. We found that changes rated as more similar were judged as being more difficult to detect than changes rated as less similar; however, semantic similarity (based on linguistic descriptions) did not predict change blindness. These findings reveal that (1) people can rate the relative difficulty of different changes and predict change blindness for different images and (2) metacognitive judgements of change detection likelihood are not fully explained by low-level and semantic image properties.

Development and assessment of the Partner Exploitation Inventory

• We create and assess the Partner Exploitation Inventory (PEI). • Items were generated using act nomination and grouped using act frequency methods. • Three components emerged: Harm-Inducing, Ego-Boosting, and Emotional Manipulation. • Differences in PEI scores based on sex and dark personality traits are reported. • The PEI will be useful in investigating partner exploitation in future work. Differences in mating preferences, strategies, and goals can lead to romantic relationship conflict. One method of addressing conflict is exploitation, which occurs when deception, manipulation, coercion, or force is used to obtain a resource that the exploited is reluctant to provide. Here we create and provide initial assessment of the Partner Exploitation Inventory, which measures the use of tactics to exploit a romantic partner. Participants ( n =172) used an act nomination procedure to generate 62 exploitative acts that may be used against a romantic partner. Next, using a new group of participants ( n =516), we grouped the acts into three components that represent different forms of partner exploitation: Harm-Inducing, Ego-Boosting, and Emotional Manipulation. Men reported greater use of Ego-Boosting and Harm-Inducing exploitation, and women reported greater use of Emotional Manipulation exploitation. Evidence for the validity of the Partner Exploitation Inventory was also found through positive associations with questionnaires measuring similar constructs. This study expands our knowledge of men's use of exploitation strategies and is the first study to directly investigate women's use of exploitation strategies. We also created a tool that can be used to examine exploitation in the future.

Does the Linguistic Expectancy Bias Extend to a Second Language?

The linguistic expectancy bias (LEB) reflects the tendency to describe expectancy-consistent behavior more abstractly than expectancy-inconsistent. The current studies replicate the LEB in Portuguese and examine it in a second language (English). Earlier studies found differences in processing a first language (L1) and a second language (L2) shaping affective and cognitive processes. We did not expect these differences to shape the LEB because controlled lexical decisions (e.g., use of verbs and adjectives) are unlikely, even when using L2. Participants wrote stereotypically male or female behavioral descriptions for male and female targets. A new group of participants read those descriptions and was asked about their causes. Expectancy-consistent behavior was described more abstractly and shaped more dispositional inferences in L1 and L2. Aside from replicating the LEB in a different language, these studies indicate that structural features of language preserve a linguistic bias with implications for social perception even when using a second language.

Consensus and (lack of) accuracy in perceptions of avatar trustworthiness

In some online interactions, people use avatars to represent themselves and judge whether interaction partners should be trusted. However, little is known about human accuracy in perceptions of avatar trustworthiness. We conducted a two-stage study to investigate whether people are able to accurately judge trustworthiness in avatars. In Stage 1, participants created avatars using avatarmaker.com and made decisions as trustees in an incentivized trust game (N = 360 avatars). In Stage 2, a new group of participants (N = 315 raters) were presented with avatars created in Stage 1; rated their trustworthiness; and made decisions about whether to trust them. We observed three main results: First, there was a high level of consensus in perceptions of avatar trustworthiness. Differences in trustworthiness judgments were mainly attributed to differences between avatars (rather than differences between raters). Second, raters' trust decisions were guided by their perceptions of avatar trustworthiness. Third, perceptions of avatar trustworthiness were not associated with actual trustworthiness of avatar creators. People were not, on average, able to accurately identify the actual trustworthiness of avatar creators from avatar appearance. Our results suggest that people erroneously rely on others’ avatar appearance in online interactions.

Flexible fast-mapping: Deaf children dynamically allocate visual attention to learn novel words in American Sign Language.

Word learning in young children requires coordinated attention between language input and the referent object. Current accounts of word learning are based on spoken language, where the association between language and objects occurs through simultaneous and multimodal perception. In contrast, deaf children acquiring American Sign Language (ASL) perceive both linguistic and non-linguistic information through the visual mode. In order to coordinate attention to language input and its referents, deaf children must allocate visual attention optimally between objects and signs. We conducted two eye-tracking experiments to investigate how young deaf children allocate attention and process referential cues in order to fast-map novel signs to novel objects. Participants were deaf children learning ASL between the ages of 17 and 71 months. In Experiment 1, participants (n=30) were presented with a novel object and a novel sign, along with a referential cue that occurred either before or after the sign label. In Experiment 2, a new group of participants (n=32) were presented with two novel objects and a novel sign, so that the referential cue was critical for identifying the target object. Across both experiments, participants showed evidence for fast-mapping the signs regardless of the timing of the referential cue. Individual differences in children's allocation of attention during exposure were correlated with their ability to fast-map the novel signs at test. This study provides first evidence for fast-mapping in sign language, and contributes to theoretical accounts of how word learning develops when all input occurs in the visual modality.

Delivering an Online Cognitive Behavioral Therapy Program to Address Mental Health Challenges Faced by Correctional Workers and Other Public Safety Personnel: Protocol for a Mixed Methods Study.

BackgroundPublic safety personnel have regular and often intense exposure to potentially traumatic events at work, especially workplace violence in the case of correctional workers. Subsequently, correctional workers are at higher risk of developing mental health problems such as posttraumatic stress disorder. Public safety personnel are up to 4 times more likely to experience suicidal ideation, suicidal attempts, and death by suicide compared to the general population. Despite this high prevalence, help-seeking behaviors from public safety personnel are low due to stigma and irregular work hours limiting access to care. Innovative treatments are needed to address these challenges.ObjectiveThis study will investigate the efficacy of an electronically delivered cognitive behavioral therapy (e-CBT) program tailored to correctional workers’ mental health problems.MethodsThis study is composed of 4 phases. In phase 1, we will interview correctional workers individually and in focus groups to identify personal, social, and cultural factors affecting their mental health and barriers to care. Phase 2 will use the information gathered from the interviews to develop gender- and diagnosis-specific e-CBT modules. These will be presented to a new group of participants who will provide further feedback on their usability and accessibility. In phase 3, we will randomly assign participants to either an e-CBT or treatment as usual arm. The program will be evaluated with validated symptomatology questionnaires and interviews. Phase 4 will use this additional information to fine-tune the e-CBT modules for a larger-scale randomized controlled trial design comparing the e-CBT program to in-person CBT. All e-CBT modules will be delivered through a secure online platform.ResultsThe study received ethics approval in December 2020, and participant recruitment began in March 2021. Participant recruitment has been conducted through targeted advertisements and physician referrals. To date, there have been 15 participants recruited for Phase 1, and it is expected to conclude in July 2021, with phase 2 beginning in September 2021. Complete data collection and analysis from all phases are expected to conclude by July 2023. Linear and binomial regression (for continuous and categorical outcomes, respectively) will be conducted along with interpretive qualitative methods.ConclusionsIf proven efficacious and feasible, this e-CBT program can provide a high-quality and clinically validated resource to address the mental health problems of correctional workers. Additionally, findings can contribute to the development of innovative treatments for other public safety professions.Trial RegistrationClinicalTrials.gov NCT04666974; https://www.clinicaltrials.gov/ct2/show/NCT04666974International Registered Report Identifier (IRRID)DERR1-10.2196/30845

Age-Specific Effects of Lexical-Semantic Networks on Word Production.

The lexical–semantic organization of the mental lexicon is bound to change across the lifespan. Nevertheless, the effects of lexical–semantic factors on word processing are usually based on studies enrolling young adult cohorts. The current study aims to investigate to what extent age‐specific semantic organization predicts performance in referential word production over the lifespan, from school‐age children to older adults. In Study 1, we conducted a free semantic association task with participants from six age‐groups (ranging from 10 to 80 years old) to compute measures that capture age‐specific properties of the mental lexicon across the lifespan. These measures relate to lifespan changes in the Available Richness of the mental lexicon and in the lexical–semantic Network Prototypicality of concrete words. In Study 2, we used the collected data to predict performance in a picture‐naming task on a new group of participants within the same age‐groups as for Study 1. The results show that age‐specific semantic Available Richness and Network Prototypicality affect word production speed while the semantic variables collected only in young adults do not. A richer and more prototypical semantic network across subjects from a given age‐group is associated with faster word production speed. The current results indicate that age‐specific semantic organization is crucial to predict lexical–semantic behaviors across the lifespan. Similarly, these results also provide cues to the understanding of the lexical–semantic properties of the mental lexicon and to lexical selection in referential tasks.

0332 Effect of Prior Sleep Duration on Distinct Measures of Daytime Cognitive Performance in Late Adolescence

Abstract Introduction A recent longitudinal study of sleep need changes across adolescence reported how prior sleep duration affects daytime sleepiness and vigilant attention in children ages 10-16 years. In a follow-up study, we extend the age range in a new group of participants and add additional performance tests. Here we report year 1 data on the effect of systematically varied time in bed (TIB) on daytime vigilance, working memory, and decision making. Methods Data are for 52 participants aged 15.0-20.4 years (mean±SD: 17.7±1.8 years). Annually, participants keep each of three different TIB schedules: 7h, 8.5h or 10h TIB for 4 consecutive nights. The 4th night is followed by a laboratory day of performance testing. The day includes four 10-minute psychomotor vigilance tests (PVT); a serial position Sternberg working memory task; and an AX continuous performance test with switch (AX-CPTs) measuring cognitive flexibility in decision making. Results PVT performance evaluated by the log of the signal to noise ratio (LSNR) improved monotonically with increasing TIB (p<0.0001). TIB also affected serial position Sternberg task accuracy (p=0.008) but not the probe position effect (p=0.66), indicating that TIB did not affect working memory. TIB also affected AX-CPTs accuracy (p<0.0001), but TIB did not significantly affect decision making and cognitive flexibility measures extracted from this task (all p>0.09). Conclusion The initial data from this longitudinal study on older adolescents confirm what we observed for younger adolescents. Increasing TIB improves daytime vigilance but does not affect working memory. These initial results also do not indicate a TIB related improvement in decision making. Data from the entire three year longitudinal study will allow us to further investigate relations of performance to prior sleep duration and whether these relations change with age. Results from dose-response studies such as these can help guide sleep duration recommendations. Support PHS grant R01 HL116490 supported this work.

Visual experience forms a multidimensional pattern that is not reducible to a single measure: Evidence from metacontrast masking.

A metacontrast masking paradigm was employed to provide evidence for the richness and diversity of our visual experience. Square- and diamond-shaped targets were followed by square- and diamond-shaped masks at varying stimulus onset asynchronies (SOAs), resulting in shape-congruent and shape-incongruent trials. In Experiment 1, participants reported in each trial how they perceived target and mask. After extended training, seven different aspects of the target could be distinguished as specific percepts in this metacontrast masking paradigm. These percepts encompass aspects including the temporal distance between both stimuli, the perceived contrast of the target, and motion percepts resulting from the interplay between the target and mask. Participants spontaneously reported each of these percepts, and the frequency of reports varied systematically with SOA and the congruency between target and mask. In Experiment 2, we trained a new group of participants to distinguish each of these target percepts. Again, the frequency of reports of the specific percepts varied with SOA and congruency, just as in Experiment 1. In a last session, we measured objective discrimination performance yielding the typical individually different masking functions across SOAs. An examination of the relation between the frequencies of reports of subjective percepts and objective discrimination performance revealed multiple dissociations between these measures. Results suggest a multidimensional pattern of subjective experiences under metacontrast, which is reflected in dissociated subjective and objective measures of visual awareness. As a consequence, awareness cannot be assessed exhaustively by a single measure, thus challenging the use of simple one-dimensional subjective or objective measures in visual masking.

Visual experience forms a multidimensional pattern that is not reducible to a single measure: Evidence from metacontrast masking

A metacontrast masking paradigm was employed to provide evidence for the richness and diversity of our visual experience. Square- and diamond-shaped targets were followed by square- and diamond-shaped masks at varying stimulus onset asynchronies (SOAs), resulting in shape-congruent and shape-incongruent trials. In Experiment 1, participants reported in each trial how they perceived target and mask. After extended training, seven different aspects of the target could be distinguished as specific percepts in this metacontrast masking paradigm. These percepts encompass aspects including the temporal distance between both stimuli, the perceived contrast of the target, and motion percepts resulting from the interplay between the target and mask. Participants spontaneously reported each of these percepts, and the frequency of reports varied systematically with SOA and the congruency between target and mask. In Experiment 2, we trained a new group of participants to distinguish each of these target percepts. Again, the frequency of reports of the specific percepts varied with SOA and congruency, just as in Experiment 1. In a last session, we measured objective discrimination performance yielding the typical individually different masking functions across SOAs. An examination of the relation between the frequencies of reports of subjective percepts and objective discrimination performance revealed multiple dissociations between these measures. Results suggest a multidimensional pattern of subjective experiences under metacontrast, which is reflected in dissociated subjective and objective measures of visual awareness. As a consequence, awareness cannot be assessed exhaustively by a single measure, thus challenging the use of simple one-dimensional subjective or objective measures in visual masking.

A practical example of using theoretical sampling throughout a grounded theory study

PurposeThe purpose of this paper is to discuss the practical use of theoretical sampling as a method for selecting data that provide a richer and deeper understanding of the phenomenon being investigated.Design/methodology/approachTheoretical sampling is a well-known method in grounded theory studies to seek additional data based on concepts developed from initial data analysis. This method involves following where the data have led to expand and refine the evolving theory during the analytical process. However, there is a dearth of information detailing the practical steps needed to undertake theoretical sampling.FindingsThe authors used the theoretical sampling method in their study in four ways: asking additional interview questions and/or widening the scope of existing interview questions; recruiting participants with additional diversity of attributes within the same group; and adding a new group of participants and expanding research settings.Originality/valueTheoretical sampling is a valuable and practical method for the purpose of addressing gaps in the data in qualitative research. When using theoretical sampling, it is essential to consider potential strategies for countering challenges that may arise. Practical recommendations are offered on the use of theoretical sampling during data analysis, for the purpose of achieving theoretical integration.

The perceptual assimilation and discrimination of 20 Hindi consonants by native speakers of English

Hindi consonant contrasts are known to pose difficulties for native English speakers (e.g., Polka, 1991; Werker and Tees, 2002; and Cibelli, 2015). While a limited set of Hindi consonants have received a great deal of attention (i.e., the coronal stops), we do not yet know how learners perceive other segments from Hindi’s relatively large consonant inventory. To address this gap, we conducted a perceptual assimilation study modeled after Faris et al. (2018) to investigate the perceptual assimilation of twenty Hindi consonants (tʃ, tʃʰ, dʒ, dʒʰ, t, tʰ, d, dʰ, ʈ, ʈʰ, ɖ, ɖʰ, ʃ, ʂ, s, z, l, r, ɽ, ɽʰ) by native English speakers with no prior Hindi language learning experience. We later examined the discrimination of 46 pairs from the same set of phones in a new group of participants from the same population using an AX discrimination task. Participants exhibited patterns of perceptual assimilation and discrimination of Hindi phonemes that suggest that native English speakers will experience difficulty across the Hindi consonant inventory. We consider the findings in the context of the Perceptual Assimilation Model (Best, 1994 and Best and Tyler, 2007), providing a fuller account of the difficulty posed by the Hindi consonant inventory for second-language learners.Hindi consonant contrasts are known to pose difficulties for native English speakers (e.g., Polka, 1991; Werker and Tees, 2002; and Cibelli, 2015). While a limited set of Hindi consonants have received a great deal of attention (i.e., the coronal stops), we do not yet know how learners perceive other segments from Hindi’s relatively large consonant inventory. To address this gap, we conducted a perceptual assimilation study modeled after Faris et al. (2018) to investigate the perceptual assimilation of twenty Hindi consonants (tʃ, tʃʰ, dʒ, dʒʰ, t, tʰ, d, dʰ, ʈ, ʈʰ, ɖ, ɖʰ, ʃ, ʂ, s, z, l, r, ɽ, ɽʰ) by native English speakers with no prior Hindi language learning experience. We later examined the discrimination of 46 pairs from the same set of phones in a new group of participants from the same population using an AX discrimination task. Participants exhibited patterns of perceptual assimilation and discrimination of Hindi phonemes that suggest that native English speakers will experience difficulty acro...