Mixed Factorial Design Research Articles

The first principles of instruction: an examination of their impact on preservice teachers’ TPACK

The flipped approach has been widely adopted in higher education, yet its theoretical framework and use in teacher preparation courses have been limited. To address these gaps, this study examined the impact of the First Principles of Instruction when applied to designing face-to-face and flipped technology integration courses. Participants were 32 preservice teachers enrolled during the 2017 spring and fall semesters. Employing a 3-way mixed factorial research design, we measured participants’ technological, pedagogical, content knowledge (TPACK) outcomes in each group and compared the outcomes between the face-to-face and flipped groups. In both groups, preservice teachers’ self-perceptions and application of TPACK statistically significantly increased. The magnitude of the TPACK application results (F2F p < .001, d = 1.17; Flippeda p < .001, d = 1.97) strongly demonstrates the First Principles’ potential to frame effective course design. Further analyses revealed no statistically significant differences between groups’ TPACK outcomes. These non-significant differences suggest the First Principles of Instruction may be equally effective for designing flipped and face-to-face courses. We conclude the article by discussing implications for course design and detailing considerations for future research on flipped approaches.

Achieving structured knowledge management with a novel online group decision support system

Knowledge management (KM) is a complicated process that involves socialization, externalization, combination, and internalization and requires close collaboration among the people involved. Although Nonaka proposed the SECI (Socialization, Externalization, Combination, Internalization) model and the concept of Ba, which provides a process-oriented view of knowledge creation and transfer, practicing it is rather ad hoc. COVID-19 has provided a chance for practitioners to find a new method for KM. In this study, we adapted a group problem-solving system called TeamSpirit and structured it as a Ba for the SECI model. We then compared TeamSpirit with two other implementations of Ba, email and face-to-face communication, to evaluate their effects on knowledge externalization, knowledge combination, and knowledge internalization. Then, we evaluated whether these knowledge-conversion processes could improve knowledge acquisition and intention to share knowledge. A 3 × 2 mixed factorial design experiment was conducted. The results show that (a) TeamSpirit was better than the others, and face-to-face was better than email for each of the three knowledge conversion processes (externalization, combination, and internalization) and (b) the better the team’s knowledge conversion process lead, the stronger its knowledge acquisition and knowledge-sharing intention.

Enhancement of perceived body ownership in virtual reality-based teleoperation may backfire in the execution of high-risk tasks

Guided by previous research on the role of embodiment in virtual environments, this study aimed to investigate the potential effects of using human-like (compared to robotic) virtual hands on work performances in the context of virtual reality (VR)-based teleoperation of high-risk machinery. A 2 × 2 mixed factorial design experiment (N = 74), with the virtual hand representation as a within-subjects factor (robotic vs. human-like virtual hands) and the risk of danger as a between-subjects factor (low vs. high), was conducted to examine the effects of virtual hand representations (i.e., human-likeness) on perceived body ownership (i.e., embodiment), risk perception, intention to work using the teleoperator, and work performance (i.e., the number of successful task completions). In addition, the moderating effects of the risk of danger on the relationship between perceived body ownership and risk perception were explored. Results showed that the enhancement of perceived body ownership in VR-based teleoperation, induced by the use of human-like hands, increased the risk perception and degraded workers’ task performances in the execution of high-risk tasks. Further implications of the findings were discussed.

Using gender responsive collaborative learning strategy to improve students achievement and attitude towards learning science in virtual and hands-on laboratory environment

One way of ensuring gender equality in science education is by mainstreaming gender components into the pedagogical delivery of science instruction. Thus, the researchers in this study designed a Gender Responsive Collaborative Learning Strategy (GR-CLS) based on Universal Design for Learning (UDL) principles. The effectiveness of this instructional paradigm on students’ achievement and attitude was determined in a mixed factorial quasi-experimental research design study conducted in a virtual and hands-on laboratory learning environment. Multistage sampling technique was used to select a total sample of 218 secondary school students from same sex and mixed sex schools. The six hypotheses formulated in the study were tested using Means and Analysis of Covariance (ANCOVA). Empirical findings revealed a significant difference in the mean achievement and attitude scores of both male and female students who were exposed to GR-CLS under virtual and hands-on laboratory environment respectively compared to those who were not exposed to GR-CLS. These results indicate that GR-CLS is an effective pedagogical strategy for improving students’ achievement and attitude regardless of gender. Nevertheless, it was discovered that GR-CLS leads to a significant improvement in the achievement of students from same sex schools over mixed sex schools. The study, therefore, recommends the adoption of GR-CLS by science teachers in the planning and implementation of science lessons to create equal opportunities for both male and female students to benefit maximally from learning activities carried out in the laboratory.

Effects and Prerequisites of Self-Generation in Inquiry-Based Learning

The goal of this study is to investigate the effect of self-generation in inquiry-based learning and to identify the role of feedback. While open-ended inquiry-based learning with a high degree of self-generation requirements has long been considered optimal for facilitating effective learning, its long-run effects have been critically challenged. This study employed a 3 (learning condition) × 2 (retention interval) mixed factorial design (N = 98). An inquiry activity involving the self-generation of content knowledge with or without subsequent feedback was compared to an inquiry task in which students simply read hypotheses and data interpretations. Self-generation without feedback was subject to rereading and self-generation with feedback. However, no differences were found under the two latter conditions. An additional analysis of individual learners’ abilities revealed that different abilities (e.g., cognitive load, self-generation success) served as predictors of performance in the disparate treatments.

The use of legal and social sanctions as a norming influence on texting while driving

ABSTRACT Laws banning texting while driving in the United States have not been highly successful in curbing the target behaviour. The aim of the current study was to explore the influence of normative campaign messages on texting while driving among college students from three states where the length of a ban on the behaviour differed. An online experiment using a 3 (State: more than 3 years vs. less than 1 year vs. no ban) × 2 (Message type: legal sanction vs. social sanction) × 2 (Time: pre- vs. post-message measures) mixed factorial design (N = 115) revealed that one-time exposure to the message containing a legal sanction changed perceived legal consequences regardless of state of residency. Furthermore, the legal sanction message was more effective than the social sanction message not only in fostering an unfavourable attitude toward texting while driving but also in weakening behavioural intention in the state where texting while driving had not been legally banned. The social sanction, on the other hand, was more effective than the legal sanction in the state where the law had been in effect less than 1 year, while its effect was the opposite direction in the state with no legal prohibition. Findings suggest that interventions conveying social norms against the behaviour might create immediate reactance to the intervention message unless it reinforces the ban. Instead, using a public campaign to reinforce the legal consequences of texting while driving is a promising way to minimize or prevent this risky behaviour.

The Cardioprotective Role of Flaxseed in the Prevention of Doxorubicin- and Trastuzumab-Mediated Cardiotoxicity in C57BL/6 Mice

Although the combination of doxorubicin (DOX) and trastuzumab (TRZ) reduces the progression and recurrence of breast cancer, these anticancer drugs are associated with significant cardiotoxic side effects. We investigated whether prophylactic administration of flaxseed (FLX) and its bioactive components, α-linolenic acid (ALA) and secoisolariciresinol diglucoside (SDG), would be cardioprotective against DOX+TRZ-mediated cardiotoxicity in a chronic in vivo female murine model. Wild-type C57BL/6 female mice (10-12 wk old) received daily prophylactic treatment with one of the following diets: 1) regular control (RC) semi-purified diet; 2) 10% FLX diet; 3) 4.4% ALA diet; or 4) 0.44% SDG diet for a total of 6 wks. Within each arm, mice received 3 weekly injections of 0.9% saline or a combination of DOX [8mg/(kg.wk)] and TRZ [3mg/(kg.wk)] starting at the end of week 3. The main outcome was to evaluate the effects of FLX, ALA, and SDG on cardiovascular remodeling and markers of apoptosis, inflammation, and mitochondrial dysfunction. Significance between measurements was determined using a 4 (diet) × 2 (chemotherapy) × 2 (time) mixed factorial design with repeated measures. In the RC+DOX+TRZ-treated mice at week 6 of the study, the left ventricular ejection fraction (LVEF) decreased by 50% compared with the baseline LVEF (P<0.05). However, the prophylactic administration of the FLX, ALA, or SDG diet was partially cardioprotective, with mice in these treatment groups showing an ∼68% increase in LVEF compared with the RC+DOX+TRZ-treated group at week 6 (P<0.05). Although markers of inflammation (nuclear transcription factor κB), apoptosis [poly (ADP-ribose) polymerase-1 and the ratio of BCL2-associated X protein to B-cell lymphoma-extra large], and mitochondrial dysfunction (BCL2-interacting protein 3) were significantly elevated by approximately 2-fold following treatment with RC+DOX+TRZ compared with treatment with RC+saline at week 6, prophylactic administration of FLX, ALA, or SDG partially downregulated these signaling pathways. In a chronic in vivo female C57BL/6 mouse model of DOX+TRZ-mediated cardiotoxicity, FLX, ALA, and SDG were partially cardioprotective.

Slow associative learning in alcohol dependence and the alcohol cue exposure treatment paradox.

To examine two explanations for the observation that cue-exposure treatment has not been clearly effective in the treatment of alcohol dependence: do alcohol-dependent individuals have either (1) slower extinction and/or (2) greater contextual specificity of extinction than non-dependent individuals? In two exploratory laboratory experiments we used mixed factorial designs with two-group between-subjects factors and within-subjects factors corresponding to performance in different parts of a computer-based learning task. University of Southampton psychology research laboratories and two addiction treatment services in the city of Southampton, UK. Experiment 1: 74 (54 female) undergraduates from the University of Southampton (age mean=20.4years). Experiment 2: 102 (40 female) participants from the University of Southampton, the local community, and from two Southampton alcohol treatment services (age mean=41.3years). The Alcohol Use Disorders Identification Test, a 1-week time-line follow-back alcohol consumption questionnaire, the Barratt Impulsiveness Scale (11th edn), and a computerized learning task. Experiment 2 additionally used the 44-item Big Five Inventory, a drug use history checklist, and the Hospital Anxiety and Depression Scale. Experiment 1: light and heavy drinkers did not differ significantly in extinction [extinction block×drinking status interaction, P=0.761, , 95% confidence interval (CI)= (0,0.028)] or on contextual control of extinction [recovery block×drinking status interaction, P=0.514, , 95% CI=(0,0.084)]. Experiment 2: slower extinction in abstinent alcohol-dependent participants compared with light drinkers [extinction block×drinking status interaction, P=0.023, , 95% CI=0,0.069)] but no significant difference on contextual control of extinction [recovery block×drinking status interaction, P=0.069, , 95% CI=(0,0.125)]. Abstinent alcohol-dependent people may have slower extinction learning for alcohol-related cues than non-dependent light drinkers.

Which brand should be more nervous about nutritional information disclosure: McDonald's or Subway?

This study examines the health halo and horn effects in the context of two fast food brands commonly associated with healthy and unhealthy food (i.e., Subway and McDonald's). Health halo is consumers' tendency to overestimate the healthiness of certain food categories or items based on a single claim, whereas health horn is the tendency to underestimate it. Specifically, we investigated the moderating effects of nutritional information disclosure and dietary restraint on consumers' behavioral intentions. Two items from the McDonald's and Subway menus each served as stimuli. They represented health halo confirmation (Roast Chicken sandwich) or disconfirmation (Italian Spicy sandwich) and health horn confirmation (Big Mac burger) or disconfirmation (McSpicy Cajun Burger). This study employed a 2 (nutritional information: present vs. absent) × 4 (menu item type: a health halo or horn associated with Subway or McDonald's menu items with favorable and unfavorable nutritional profiles) and 2 (dietary restraint: restrained eaters vs. unrestrained eaters) × 4 (menu item type: a health halo or horn associated with Subway or McDonald's menu items with favorable and unfavorable nutritional profiles) mixed factorial design. Participants were randomly assigned to one of two experimental conditions (nutritional information: present vs. absent) and presented with all four menu items. There was a decrease in behavioral intentions toward all menu items except the one representing health horn disconfirmation. In particular, behavioral intentions were most substantially weakened for the item that entailed a health halo disconfirmation (Italian Spicy sandwich). The findings not only delineate the different practices companies adopt but also underscore the importance of nutritional information disclosure in helping consumers make healthier food choices.

Virtual reality and 360° panorama technology: a media comparison to study changes in sense of presence, anxiety, and positive emotions

Recently, 360° panorama technologies have been used to create videos and pictures of real and virtual environments, thus opening new possibilities for psychological research. The aim of this study is to compare a 360° real panorama environment to a computer-simulated one to verify if they are equally efficient in generating sense of presence, emotions, and relaxation in individuals. The study employs a 3 × 2 mixed factorial design. Forty participants took part in the study and were assessed on self-reported anxiety and mood levels before and during the virtual reality (VR) experience of a relaxing video in computer graphics or shot in 360°. After the experience, sense of presence and experience ratings were also collected. Heart rate data during the experience were also used. Both inferential and Bayesian analyses showed a lack of effect of the manipulation: there is no difference between a 360° panorama environment and a simulated environment in generating sense of presence, anxiety reduction, and in improving emotional states. These results highlight the feasibility of using a 360° real panorama VR if the participants’ task is passive and requires no active exploration of the environment, as the development of the 360° video is easier and cheaper than the one required by a computer-simulated environment.

Synthesis of inulin hydrogels by electron beam irradiation: physical, vibrational spectroscopic and thermal characterization and arsenic removal as a possible application

Inulin is a natural polysaccharide from the fructan carbohydrate subgroup. It is a great candidate to be used as a precursor of new materials for environmental and medical applications. In this work, two novel inulin hydrogels were synthesized by electron-beam irradiation: inulin-acrylamide (Inu-AAm) and inulin-polyvinyl alcohol (Inu-PVA). The use of mixed factorial experimental designs, with the swelling percentage as the response variable, allowed to find the best conditions for the preparation of the hydrogels. The best hydrogels of each type were characterized by the determination of their gel fraction, thermogravimetry (TGA) and differential scanning calorimetry (DSC) measurements. The infrared and Raman spectra confirmed the formation of new materials (xerogels). The best conditions for the preparation of the Inu-Aam hydrogel were AAm concentration of 22% (w/w), Inu-AAm ratio of 20:80 (w/w) and radiation dose of 30 kGy. For the Inu-PVA hydrogel, the best conditions were PVA concentration of 7.5% (w/w), Inu-PVA ratio of 20.78:79.22 (w/w) and a radiation dose of 20 kGy. The best Inu-AAm and Inu-PVA hydrogels showed swelling percentages of 3013 and 2408%, respectively, and values of gel fraction higher than 70%. The Inu-AAm xerogel had higher thermal stability than its precursors, while the Inu-PVA xerogel had less thermal stability than polyvinyl alcohol but more than inulin. The Inu-AAm hydrogel was selected for the sorption tests of arsenic. The sorption of arsenic followed pseudo second-order kinetics and the equilibrium sorption of arsenic on the hydrogel had a good fit to the Freundlich model.

Agree to disagree: Examining the psychometrics of cybervetting

PurposeDue to the paucity of research on web-based job applicant screening (i.e. cybervetting), the purpose of the current study was to examine the psychometric properties of cybervetting, including an examination of the impact of adding structure to the rating process.Design/methodology/approachUsing a mixed-factorial design, 122 supervisors conducted cybervetting evaluations of applicant personality, cognitive ability, written communication skills, professionalism, and overall suitability. Cross-method agreement (i.e. the degree of similarity between cybervetting ratings and other assessment methods), as well as interrater reliability and agreement were examined, and unstructured versus structured cybervetting rating formats were compared.FindingsCybervetting assessments demonstrated high interrater reliability and interrater agreement, but only limited evidence of cross-method agreement was provided. In addition, adding structure to the cybervetting process did not enhance the psychometric properties of this assessment technique.Practical implicationsThis study highlighted that whereas cybervetting raters demonstrated a high degree of consensus in cybervetting-based attributions, there may be concerns regarding assessment accuracy, as cybervetting-based ratings generally differed from applicant test scores and self-assessment ratings. Thus, employers should use caution when utilizing this pre-employment screening technique.Originality/valueWhereas previous research has suggested that cybervetting ratings demonstrate convergence with other traditional assessments (albeit with relatively small effects), these correlational links do not provide information regarding cross-method agreement or method interchangeability. Thus, this study bridges a crucial gap in the literature by examining cross-method agreement for a variety of job-relevant constructs, as well as empirically testing the impact of adding structure to the cybervetting rating process.

Effect of Ego Depletion on Interpersonal Trust among Individuals with Substance Use Disorders

ABSTRACT Individuals with substance use disorders (SUD) undergo treatment to recover from addiction. However, exerting self-control, which is essential for successful abstinence from drug addiction, can cause ego depletion. This study experimentally investigated the effect of ego depletion on interpersonal trust and examined possible changes in the ego depletion effect across different abstinence periods. This study employed a 2 (ego depletion: high vs. low) × 2 (partners: non-SUD vs. SUD) mixed factorial design. The participants were 273 male individuals with SUD and with periods of drug abstinence ranging from several days to 2 years, who resided in a compulsory drug rehabilitation center. The participants were first asked to complete an ego depletion task, followed by a decision-making task in a trust game, first with a non-SUD stranger, and then with a SUD stranger. Ego depletion was not related to trust in non-SUD strangers. However, ego depleted participants were more likely to trust SUD strangers than non-ego depleted participants. Moreover, this ego depletion effect fluctuated near the end of SUD treatment. This study highlights the importance to ensure follow-up outpatient care and offer social support services for individuals with SUD after compulsory SUD treatment.

Anthropomorphism in advertising: the effect of media on audience attitude

ABSTRACT In this paper, we have glanced into how the nonhuman entity is imagined, seen, experienced, and managed accordingly either by a consumer or by marketers. Further, we investigated the effects of media through magazine, television, and radio on broad-spectrum outcomes of anthropomorphic advertising effectiveness. Here, we have used 3 × 2 mixed factorial design and investigated empirical result that audience experienced to repetition of anthropomorphic ads on multiple-media condition of magazine, television, and radio have a greater impact on brand anthropomorphism, message credibility, ad engagement, attitude towards ad and attitude towards brand and purchase intention than audience experiences same ads in single medium under both level of product involvement.

The effects of exergames on emotional well-being of older adults

Exergames have been adopted as a new approach to promote healthy and active aging in recent years. This study aimed to understand the effects of exergames on emotional well-being (positive and negative affects) of older adults and further explore factors influencing the two types of affects after playing exergames. The study used a 2 (pre-test vs. post-test) × 3 (play alone vs. play with peers vs. play with youths) mixed factorial design with 319 Singaporean older adults with an average age of 73 years old over six weeks. Results of this study showed that playing exergames could lead to an increase in positive affect (Mdifference = 0.33, p < .001) and a decrease in negative affect (Mdifference = −0.19, p < .001) over time. Additionally, while there was no significant difference across play groups in changing positive affect over time, participants who played alone showed a greater decline in negative affect compared to those playing with peers and those playing with youths. Further, we found that after playing exergames for six weeks, attitude toward exergames is related to two types of affects and sociability can mediate such relationships. Lastly, implications and limitations of this study are discussed.

The Impact of Retransmission and Modality on Communicating Health Research Findings via Social Media

ABSTRACT Social media is an increasingly popular tool for disseminating health research findings to members of the general public and may contribute to improving the effectiveness of science communication. This study was designed to investigate how retransmission (i.e., social media content shared by a familiar, credible organization) and modality (i.e., how the message is delivered) influence the effectiveness of communicating health research findings via social media. The findings from a 2 (source) X 3 (modality) X 2 (topic) mixed factorial design experiment (N= 517) indicated that source had a significant effect, such that posts that were retransmitted by a credible organization resulted in greater perceived source credibility, greater perceived message effectiveness, and greater likelihood of an individual to engage with the post on Facebook. Modality significantly increased perceived source credibility and perceived message effectiveness when posts were retransmitted by a credible source, indicating that modality made a difference when messages were elaborated as a function of the retransmission. Also, the topic of the post had a significant impact on the study’s dependent variables of interest. Overall, the findings illustrate the potential of retransmission and modality as message features that can improve communication of health research findings on social media. Theoretical and practical implications are discussed.

Ankle Bracing Alters Coordination and Coordination Variability in Individuals With and Without Chronic Ankle Instability.

Ankle bracing is an effective form of injury prophylaxis implemented for individuals with and without chronic ankle instability, yet mechanisms surrounding bracing efficacy remain in question. Ankle bracing has been shown to invoke biomechanical and neuromotor alterations that could influence lower-extremity coordination strategies during locomotion and contribute to bracing efficacy. The purpose of this study was to investigate the effects of ankle bracing on lower-extremity coordination and coordination dynamics during walking in healthy individuals, ankle sprain copers, and individuals with chronic ankle instability. Mixed factorial design. Laboratory setting. Forty-eight recreationally active individuals (16 per group) participated in this cross-sectional study. Participants completed 15 trials of over ground walking with and without an ankle brace. Coordination and coordination variability of the foot-shank, shank-thigh, and foot-thigh were assessed during stance and swing phases of the gait cycle through analysis of segment relative phase and relative phase deviation, respectively. Bracing elicited more synchronous, or locked, motion of the sagittal plane foot-shank coupling throughout swing phase and early stance phase, and more asynchronous motion of remaining foot-shank and foot-thigh couplings during early swing phase. Bracing also diminished coordination variability of foot-shank, foot-thigh, and shank-thigh couplings during swing phase of the gait cycle, indicating greater pattern stability. No group differences were observed. Greater stability of lower-extremity coordination patterns as well as spatiotemporal locking of the foot-shank coupling during terminal swing may work to guard against malalignment at foot contact and contribute to the efficacy of ankle bracing. Ankle bracing may also act antagonistically to interventions fostering functional variability.

Experimental Study on the Mechanical Properties of Biomass Briquettes from a Mixture of Rice Husk and Pine Sawdust

In search of guaranteeing global energy requirements, waste from different agricultural, forestry and industrial sources is presented as a renewable and sustainable energy source. The manufacture of solid fuels from biomass based on the densification of this to improve its mechanical and energy properties is one of the mechanisms of viable energy production from the technical-economic point of view. The biomass mixture is one of the topics currently researched, in which various factors can affect the final behavior of the briquettes. In this research the influence on the mechanical properties of briquettes obtained from the mixture between two biomasses is studied: rice husk and pine sawdust. A mixed factorial experimental factorial design is used, in which the process temperature, the proportion of the rice husk biomass over the total mass, and the compaction time are defined as experimental factors. Experimental statistical models are obtained that partially explain the behavior of several responses that characterize the mechanical properties of the briquettes based on the selected independent parameters. It was found that the mechanical durability of the briquettes is higher than 97.5%, meets the existing standards, like German Institute for Standardization (DIN) 51731, Theological Institute Batista Ebenézer (ITEBE) SS187120 or International Organization for Standardization (ISO) 17225-2, for a compaction temperature of 110 °C and a proportion of rice husk that does not exceed 60% of the total biomass mixture in the briquette. The compaction time was also statistically significant to achieve a briquettes density and an appropriate elasticity modulus in the briquettes. The results of this research are of interest and can serve as a starting point for the design of the industrial process of densification of these two mixed biomasses.

Exploring the effect of testing on forgetting in vocabulary learning: an examination of the bifurcation model

ABSTRACT Research on the testing effect demonstrated a stronger decrease in performance for repeated studying compared to repeated testing. The bifurcation model attributes this test-delay interaction to different distributions of item memory strength. The present study tested the assumptions of the bifurcation model for learning foreign language vocabulary. We hypothesised an elimination or reduction of the interaction in a test/feedback condition because feedback prevents the bifurcation of item memory strength. Our experiment based on a 3 (Learning Method within: Test, test/feedback, copy) × 3 (Retention Interval between: Immediate, 1-week, 2-weeks) mixed factorial design with a sample of N = 122. The greatest long-term retention was achieved in the test/feedback condition. The bifurcation model was supported by a reduced test-delay interaction for the test/feedback condition. Further evidence for the bifurcation model is needed as interpretations on the dropout rates of items with different recall success were limited due to a floor effect.

Excessive daytime sleepiness in adults with spinal cord injury and associations with pain catastrophizing and pain intensity.

Pre-post cohort mixed factorial design. Excessive daytime sleepiness (EDS) and chronic pain are major problems for people with spinal cord injury (SCI). However, the relationship between chronic pain and EDS requires clarification. The goal of the study was to determine associations between pain catastrophizing (PC) and pain intensity (PI) with EDS in adults with SCI. New South Wales, Australia. Participants included 45 adults with SCI and 44 able-bodied controls. The relationship between PI, PC, and EDS was explored by determining the influence of PC and PI on the performance of both groups in a behavioral test of EDS called the Oxford Sleep Resistance Test. PC and PI were assessed by self-report. The association between EDS, pain, and other relevant factors like fatigue and mood was established using multidimensional scaling in the SCI group data. PC was found to have a significant association with EDS, with 33.3% falling asleep in the SCI group with low PC, compared with 70% in those with high PC. Only 10% of the controls fell asleep regardless of PC. PI did not significantly influence EDS in either group. Multidimensional scaling showed EDS was closely related to PC, PI, pain interference, fatigue, and mood. PC appears to be strongly associated with EDS in SCI. Findings suggest significant sleep benefits may occur in adults with SCI by treating cognitive biases like PC, as well as addressing associated factors like fatigue, pain interference, low mood, and so on.