Free Recall Task Research Articles

Emotional Context Shapes the Serial Position Curve.

Emotional contexts affect memory processes. However, the impact of contextual priming as a function of the emotional valence on the recall of neutral information is not fully understood. The aim of the present study was to evaluate how a conditioning of emotional context during encoding may influence the subsequent memory of otherwise neutral materials in a well-established phenomenon as the serial position effect. Participants performed a free recall task for neutral words in three conditions: (i) word list alone; (ii) word list coupled with positive or neutral images; and (iii) word list coupled with negative or neutral images. Images were presented before each word stimulus. In three different experiments, the emotional context during the word list presentation was manipulated separately for primacy and recency clusters, and for the middle words (‘middlecy’). Emotional context affects free recall of neutral stimuli, changing the serial position curve effect across conditions. Namely, emotional images presented in the primacy and recency clusters worsen accuracy, whereas their occurrence in the ‘middlecy’ cluster reduces the oblivion. The present findings show that the typical pattern related to the serial position curve for neutral information can be shaped by the conditioning of emotional context. Findings have implications in medical-legal contexts in the case of the recollection of events with high emotional content.

Odor-based context-dependent memory: influence of olfactory cues on declarative and nondeclarative memory indices.

Reinstating the olfactory learning context can increase access to memory information, but it is not fully clear which memory functions are subject to an enhancing odor context reinstatement effect. Here, we tested whether congruent odor context during encoding and recall positively affected declarative and nondeclarative memory scores using a novel method for manipulation of an odorous environment; namely, intranasal Nosa plugs. Recall of a text and a complex figure as well as performance in a priming task were assessed immediately and 1 wk after encoding. We found that congruent odor exposure at encoding and recall aided free retrieval of a story at delayed testing but had no significant effect on a complex figure recall or a word completion task. Differences between the assessed memory indices suggest that olfactory environmental cues may be primarily efficient in free verbal recall tasks.

How do we process feedback? The role of self-esteem in processing self-related and other-related information

This study was designed to investigate the effect of the level and stability of self-esteem on self-referent vs. other-referent feedback recall and to determine which of the opposed self-concept motives, self-enhancement or self-verification, will prevail in adolescents with certain type of self- esteem. In a between-subjects experimental design, 450 high school graduates and freshmen were randomly assigned to a self-referent task (n = 230) or other-referent task (n = 220) and their self-esteem was measured by repeated administration of the RSE scale. After personality and cognitive ability test, participants in a self-referent task were presented with a bogus feedback which consisted of statements that described a specific positive or negative behavior that one is likely to do. Participants in the other-referent received the same information, but relating to an unknown person. Memory was tested on a surprise free recall task. Findings confirm preferential processing of self-related information, i.e. self-reference effect, regardless of valence and content-related domain of feedback. Participants in self-referent condition also showed better recall of positive than negative personally relevant feedback, regardless of their self-esteem stability or self-esteem level. However, interaction of self-esteem level and self-esteem stability was significant, but its effect was relatively small.

Pupillary correlates of individual differences in long-term memory.

The present study is the first to examine individual differences in long-term memory, arousal dysregulation, and intensity of attention within the same experiment. Participants (N = 106) completed 28 lists of an immediate free-recall task while their pupil diameter was recorded via an eye-tracker during the encoding period. Two main pupillary measures were extracted: intraindividual variability in pre-list pupil diameter and evoked pupillary responses during item encoding. Variability in pre-list pupil diameter served as a measure of arousal dysregulation, and evoked pupillary responses served as a measure of intensity of attention. Based on prior work, we hypothesized that there would be a positive association between intensity of attention and recall ability, and that there would be a negative association between arousal dysregulation and recall ability. Collectively these two measures accounted for 19% of interindividual variance in recall, with 5% attributable uniquely to intensity of attention and 12% attributable uniquely to arousal regulation. The findings demonstrate that there are sources of individual differences in long-term memory that can be revealed via pupillometry, notably the amount of effort deployed during item encoding and the degree to which people exhibit dysregulated arousal. Both findings are consistent with recent theorizing regarding the role of the locus coeruleus (LC)-norepinephrine (NE) system's role in goal-directed cognition. Specifically, the LC governs both moment-to-moment arousal and NE release to cortical regions subserving cognitive processing. Among people for whom this system operates most optimally, long-term memory retention is superior.

Acquisition of Novel Concrete and Abstract Words Through the Textual and Graphical Context

Abstract words, due to the absence of material referents, are more difficult to learn and process than concrete ones (the concreteness effect). Here, we have investigated this effect by assessing the outcomes of concrete and abstract word learning provided by meaningful textual or graphical contexts. Five tasks including Free recall, Reco­gnition, Lexical decision, Definition, and multiple-choice Semantic judgment tasks were used to assess the success of the acquisition of newly learnt words at lexical and semantic levels. Within-group analysis revealed the concreteness effect in both experimental groups. However, it was more pronounced after a graphical than a textual presentation (in three tasks vs one) supporting the crucial role of the non-verbal (imagery) system in learning of concrete words. Between-group analysis showed more accurate Recall and Definition of concrete nouns as well as better performance of both types of words in terms of Definition quality in the graphical group in comparison with the textual one. However, participants from the textual group recognised novel abstract words better than the other learners. Interestingly, only one between-group difference that was found for abstract words in the Definition task (definition quality) reached significance after the Bonferroni corrections for multiple comparisons. The results show that (1) concrete and abstract word processing may have partly distinct cognitive mechanisms, and (2) visual associations may play a crucial role in the semantic acquisition, especially for concrete words.

Preoperative Visual Measures of Verbal Learning and Memory and their Relations to Speech Recognition After Cochlear Implantation.

This study examined the performance of a group of adult cochlear implant (CI) candidates (CIC) on visual tasks of verbal learning and memory. Preoperative verbal learning and memory abilities of the CIC group were compared with a group of older normal-hearing (ONH) control participants. Relations between preoperative verbal learning and memory measures and speech recognition outcomes after 6 mo of CI use were also investigated for a subgroup of the CICs. A group of 80 older adult participants completed a visually presented multitrial free recall task. Measures of word recall, repetition learning, and the use of self-generated organizational strategies were collected from a group of 49 CICs, before cochlear implantation, and a group of 31 ONH controls. Speech recognition outcomes were also collected from a subgroup of 32 of the CIC participants who returned for testing 6 mo after CI activation. CICs demonstrated poorer verbal learning performance compared with the group of ONH control participants. Among the preoperative verbal learning and memory measures, repetition learning slope and measures of self-generated organizational clustering strategies were the strongest predictors of post-CI speech recognition outcomes. Older adult CI candidates present with verbal learning and memory deficits compared with older adults without hearing loss, even on visual tasks that are independent from the direct effects of audibility. Preoperative verbal learning and memory processes reflecting repetition learning and self-generated organizational strategies in free recall were associated with speech recognition outcomes 6 months after implantation. The pattern of results suggests that visual measures of verbal learning may be a useful predictor of outcomes in postlingual adult CICs.

Comparing mnemonic effects of iconic gestures and pictures on word memory.

Previous studies using intermodal semantic priming have found that gestures improve language memory. In the present study, we ask whether the inherent characteristics of representative gestures (iconic gestures) facilitate word memory, or it is simply the semantic content shared with the words. Two analogous experiments were carried out presenting iconic gestures, pictures, or null primes to target words (nouns and action verbs). In Experiment 1, participants performed a free word recall task. In Experiment 2, the task was one of recognition. The results showed that participants recalled (Experiment 1) an equivalent number of words preceded by gestures or pictures compared with words alone, with no prime. However, a significantly higher number of words were recognised (Experiment 2) when they were primed by iconic gestures compared with the other two conditions, an advantage also found in reaction times (RTs) and both effects being larger in verbs than in nouns. These findings are discussed regarding the differences between recall and recognition processes as well as the particular characteristics of representative gestures.

Characterization of memory profile in idiopathic REM sleep behavior disorder

ABSTRACT Objective The present study aims to examine whether declarative memory dysfunction relates to impaired core memory mechanisms or attentional and executive dysfunction in idiopathic REM Sleep Behavior Disorder (iRBD). Method In this observational, cross-sectional study, were enrolled 82 individuals with the diagnosis of iRBD according to the International Classification of Sleep Disorders and 49-matched healthy controls fulfilling inclusion criteria. All participants underwent two memory tasks, namely the Rey Auditory Verbal Learning Test (RAVLT) and Memory Binding Test (MBT), which include conditions of varying degrees of dependence on executive functioning, as well as different indicators of core memory processes (e.g., learning, retention, relational binding). Results We used Bayesian multivariate generalized linear model analysis to evaluate the effect of iRBD on memory performance controlled for effects of age and sex. Individuals with iRBD displayed worse memory performance in the delayed free recall task (b = −0.37, 95% PPI [−0.69, −0.05]), but not on delayed recognition of the same material. Their performance in cued recall tasks both in immediate and delayed conditions was in comparison to controls relatively spared. Moreover, the deficit in delayed free recall was mediated by attention/processing speed. Conclusions In iRBD, we replicated findings of reduced free recall based on inefficient retrieval (retrieval deficit), which was small in terms of effect size. Importantly, the memory profile across measures does not support the presence of core memory dysfunction, such as poor learning, retention or associative binding.

Episodic memory impairment in children and adolescents at risk for schizophrenia: A role for context processing

People with schizophrenia experience episodic memory impairments that have been theorized to reflect deficits in processing context (e.g., spatio-temporal features tied to a specific event). Although past research has reported episodic memory impairments in young people at-risk for schizophrenia, the extent to which these impairments reflect context processing deficits remains unknown. We addressed this gap in the literature by examining whether children and adolescents at risk for schizophrenia exhibit context processing deficits during free recall, a memory task with high contextual demands. Our sample included three groups (N = 58, 9–16 years old) varying in risk for schizophrenia:16 high-risk, unaffected first-degree relatives of patients with schizophrenia, bipolar disorder, and/or schizoaffective disorder, 22 clinical control participants with a comorbid disorder (ADHD and/or an anxiety disorder), and 20 healthy control participants. Participants first completed a free recall task and then completed a recognition memory task. Based on established theories of episodic memory, we assumed that context processing played a more pivotal role in free recall than recognition memory. Consequently, if schizophrenia risk is associated with context processing deficits, then memory impairment should be present in free recall measures that are most sensitive to context processing (i.e., recall accuracy and temporal contiguity). Consistent with this prediction, free recall accuracy and temporal contiguity were lower for the high-risk group than the healthy controls, whereas recognition memory was comparable across groups. These findings suggest that episodic memory impairments associated with schizophrenia in unaffected, first-degree relatives may reflect context processing deficits.

Anodal tDCS over Broca's area improves fast mapping and explicit encoding of novel vocabulary

An accumulating body of evidence suggests that transcranial direct current stimulation (tDCS) can be used to affect language processing, including word acquisition. There has been, however, no comprehensive study of effects of tDCS of the core language areas in relation to the main word-learning mechanisms. Two principal strategies have been posited as important for natural word acquisition: explicit encoding (EE) which relies on direct instructions and repetition of material, and fast mapping (FM) which operates implicitly, via context-based inference or deduction. We used anodal and cathodal tDCS of Broca's and Wernicke's areas to assess effects of stimulation site and polarity on novel word acquisition in both EE and FM regimes. 160 participants, divided into five groups, received 15 min of cathodal or anodal tDCS over one of the two areas or a sham (placebo) stimulation before learning eight novel words, presented ten times each in a short naturalistic audio-visual word-picture association session, fully counterbalanced across different learning regimes. The outcome of novel word acquisition was measured immediately after the training using a free recall task. The results showed elevated accuracy in all real stimulation groups in comparison with sham stimulation; however, this effect only reached full significance after anodal tDCS of Broca's area. Comparisons between the two learning modes indicated that Broca's anodal tDCS significantly improved both implicit and explicit acquisition of novel vocabulary in comparison with sham tDCS, without, however, any significant differences between EE and FM regimes as such. The results indicate involvement of the left inferior-frontal neocortex in the learning of novel vocabulary and suggest a possibility to promote different types of word acquisition using anodal tDCS of this area.

Personality pathology predicts increased informant-reported, but not performance-based, cognitive decline: Findings from two samples.

Research on the relationship between normal-range personality and cognitive aging has demonstrated consistent, modest effects. The current investigation increases our understanding of unhealthy cognitive aging by testing whether personality disorders (PDs), specifically borderline, avoidant, and obsessive-compulsive PDs, show prospective associations with the onset of cognitive problems. Interpersonal stressful life events and social support were expected to mediate these relationships. The current investigation used data from 2 longitudinal studies of older adulthood: the Alzheimer's disease Research Center cohort (ADRC, N = 434, Mage = 69.95, 56% women) and the St. Louis Personality and Aging Network study (SPAN, N = 1,058, Mage = 65.92, 54% women). The ADRC study administered a battery of neuropsychological tests to assess cognitive ability/memory. Borderline PD was measured with a composite from the NEO Five-Factor Inventory. The SPAN study administered self-, informant, and interview measures of the three PDs; a free-recall task; and an informant report measure of cognitive problems. Borderline PD features exhibited cross-sectional correlations with memory (ADRC: r = -.11; SPAN: all rs = -.08), general cognitive ability (ADRC: r = -.11), and informant-reported cognitive problems (rs ranged from .15 to .39). Most importantly, borderline PD features predicted an increase in informant-reported cognitive problems in SPAN participants (standardized bs = .13 and .15) over a 2-year period, but they did not predict a deterioration in the performance-based cognitive measures in either study. Avoidant and obsessive-compulsive PDs exhibited little association with cognitive aging. Neither interpersonal variable mediated any of these effects. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Impairment of aversive episodic memories during Covid-19 pandemic: The impact of emotional context on memory processes

The threatening context of the COVID-19 pandemic provided a unique setting to study the effects of negative psychological symptoms on memory processes. Episodic memory is an essential function of the human being related to the ability to store and remember experiences and anticipate possible events in the future. Studying this function in this context is crucial to understand what effects the pandemic will have on the formation of episodic memories. To study this, the formation of episodic memories was evaluated by free recall, recognition, and episode order tasks for an aversive and neutral content. The results indicated that aversive episodic memory is impaired both in the free recall task and in the recognition task. Even the beneficial effect that emotional memory usually has for the episodic order was undermined as there were no differences between the neutral and aversive condition. The present work adds to the evidence that indicates that the level of activation does not modify memory processes in a linear way, which also depends on the type of recall and the characteristics of the content to be encoded.

Effect of self-reported internal memory strategy use on age-related episodic and working memory decline: Contribution of control processes.

We explored whether control processes could account for age-related differences in internal strategy use, which in turn would contribute to episodic and working memory decline in aging. Young and older adults completed the internal strategy subscale of the Metamemory in Adulthood (MIA) questionnaire, a free-recall task (FRT), a reading span task (RST), and 3 executive control tasks (the Wisconsin Card Sorting Test, the Initial Letter Fluency Test, and the Digit Symbol Substitution Test) allowing us to calculate a composite index of control processes. Results indicated that both self-reported internal strategy use and control processes index accounted for a significant proportion of the age-related variance in the FRT and the RST. However, once the control processes index was controlled for, variance in both the FRT and RST explained by internal strategy use were significantly reduced. Additionally, age-related variance in internal strategy use was mediated by the control processes index. These results suggest a cascade model in which individual control level would mediate age-related differences in internal strategy use, which in turn would mediate age-related differences in episodic and working memory performance. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Memory training in older adults with mild cognitive impairment: Positive effects are found five years after MEMO training compared to control intervention

AbstractBackgroundCognitive training was found to have a positive effect on the memory of healthy older adults, including long‐term benefits (Rebok et al, 2014). This finding offers hope that cognitive training could contribute to prevention approaches. However, little is known regarding the long‐term benefits of cognitive training in older adults with mild cognitive impairment (MCI), many of whom are in the early phase of Alzheimer’s disease. In a prior randomized controlled trial (Belleville et al, 2018), we reported a short‐term benefit of cognitive training on the delayed recall of older adults with MCI. The objective of this study was to assess the impact five years later.MethodThis is the five‐year follow‐up of a single‐blind randomized controlled trial (MEMO+). Participants with amnestic MCI were randomized to memory training or an active (psychosocial intervention) or passive (no‐contact) control condition. Interventions were provided in small groups over eight two‐hour sessions with a single booster session offered three months following training. In the initial study, participants were assessed post‐training, as well as three and six months after the intervention. The 127 participants with MCI, who completed the 6‐month post‐training assessment, were contacted five years post‐training. Primary outcomes included a 12‐word free recall task, a self‐reported strategy used in everyday life, and the Montreal Cognitive Assessment screening test (MoCA). Participants randomized to cognitive training were compared to those randomized to the control conditions.ResultParticipants with MCI, who were randomized to the cognitive training condition, showed a reduced 5‐year decline on the delayed recall task when compared to participants in the control conditions. Participants randomized to the cognitive training condition also demonstrated superior delayed recall and MoCA performance than those in the control condition, five years post‐training. There were no differences on self‐reported strategy use.ConclusionThe positive effect of cognitive training was found five years later on measures of delayed memory and global cognitive status in individuals with MCI. This indicates that the use of cognitive training is a valid preventive approach and has potential to delay the onset of dementia in at‐risk individuals.

Emotional Modulation of Episodic Memory in School-Age Children and Adults: An Event-Related Potential Study.

The Emotional Enhancement of Memory (EEM) has been well-demonstrated in adults, but less is known about EEM in children. The present study tested the impact of emotional valence of pictures on episodic memory using behavioral and neurophysiological measures. Twenty-six 8- to 11-year-old children were tested and compared to 30 young adults. Both groups participated in pictures’ intentional encoding tasks while event-related potentials (ERPs) were recorded, followed by immediate free recall tasks. Behavioral results revealed a general EEM in free recall performances in both groups, along with a negativity effect in children. ERP responses revealed a particular sensitivity to negative pictures in children with a late emotion effect at anterior clusters, as well as a greater successful encoding effect for emotional pictures compared to neutral ones. For adults, the emotion effect was more pronounced for positive pictures across all time windows from the centro-parietal to the frontal part, and localized in the left hemisphere. Positive pictures also elicited a greater successful encoding effect at anterior clusters in adults. By combining behavioral and neurophysiological measures to assess the EEM in children compared with adults, our study provides new knowledge concerning the interaction between emotional and memory processes during development.

Neurons in the human medial temporal lobe track multiple temporal contexts during episodic memory processing

Episodic memory requires associating items with temporal context, a process for which the medial temporal lobe (MTL) is critical. This study uses recordings from 27 human subjects who were undergoing surgical intervention for intractable epilepsy. These same data were also utilized in Umbach et al. (2020). We identify 103 memory-sensitive neurons in the hippocampus and entorhinal cortex, whose firing rates predicted successful episodic memory encoding as subjects performed a verbal free recall task. These neurons exhibit important properties. First, as predicted from the temporal context model, they demonstrate reinstatement of firing patterns observed during encoding at the time of retrieval. The magnitude of reinstatement predicted the tendency of subjects to cluster retrieved memory items according to input serial position. Also, we found that spiking activity of these neurons was locked to the phase of hippocampal theta oscillations, but that the mean phase of spiking shifted between memory encoding versus retrieval. This unique observation is consistent with predictions of the “Separate Phases at Encoding And Retrieval (SPEAR)” model. Together, the properties we identify for memory-sensitive neurons characterize direct electrophysiological mechanisms for the representation of contextual information in the human MTL.

Eight memory researchers investigating their own autobiographical memory

AbstractThe present article provides a descriptive review of the studies conducted by eight memory researchers who empirically investigated their own autobiographical memory. They are Francis Galton, Madorah Smith, Marigold Linton, Willem Wagenaar, Steen Larsen, Dorthe Berntsen, Alan Baddeley and Richard White. These authors assessed their ability to remember their personal past by means of a range of experimental procedures and materials including personal diaries, letters, cued and free recall tasks. The methods implemented so far allowed memory researchers to obtain relevant findings on a number of issues which are at the heart of the contemporary autobiographical memory debate, that is, forgetting, memory accuracy, phenomenology, memory content and memory organisation. The findings of the individual studies are compared and contrasted with those of conventional autobiographical memory functioning. It is argued that the strengths of the memory researchers' self‐studies of autobiographical memory outweigh their weaknesses.

Differences in automatic emotion regulation after social exclusion in individuals with different attachment types

Longing for good social relations is an eternal pursuit of individuals, but the occurrence of social exclusion destroys this pursuit. Research has shown that sometimes there is no difference between the emotional state of individuals after exclusion and the acceptance, but they engage in automatic emotional regulation. We are interested in whether all individuals experiencing exclusion have the same level of automatic emotion regulation. Scholars point out that the attachment system can be regarded as an emotional regulation device, in social interaction, when individuals feel threat and pressure, they would automatically stimulate the attachment system, so that individuals with different attachment types could express different emotion regulation patterns, but few studies have examined the relationship between social rejection and attachment. Therefore, this study examined the differences in automatic emotion regulation after social exclusion in individuals with different attachment types. Individuals' attachment types were classified by questionnaire measures, the lonely end-of-life paradigm was used for the manipulation of social exclusion, and the free recall task and the visual search task were used to measure individuals' levels of automatic emotion regulation, respectively. This study indicated that individuals in the exclusion group produced significant automatic emotion regulation compared to the acceptance group, and that secure attachment individuals had more significant automatic emotion regulation than insecure attachment individuals in the exclusion group. The information gained by the current study could improve the understanding of the underlying mechanisms of personality traits and emotion regulation, and could provide methods for individuals to deal with negative events such as social exclusion.

Dual coding of knowledge in the human brain.

How does the human brain code knowledge about the world? While disciplines such as artificial intelligence represent world knowledge based on human language, neurocognitive models of knowledge have been dominated by sensory embodiment, in which knowledge is derived from sensory/motor experience and supported by high-level sensory/motor and association cortices. The neural correlates of an alternative disembodied symbolic system had previously been difficult to establish. A recent line of studies exploring knowledge about visual properties, such as color, in visually deprived individuals converge to provide positive, compelling evidence for non-sensory, language-derived, knowledge representation in dorsal anterior temporal lobe and extended language network, in addition to the sensory-derived representations, leading to a sketch of a dual-coding knowledge neural framework.

Reading and analysing short story collections: An empirical study of readers' interpretation process of Benni's Il bar sotto il mare

This article confronts the theoretical tenets of reader-oriented short story collection theory and its implications for a literary analysis of Benni’s Il bar sotto il mare (1987) with the results of an empirical study of 12 readers. Through free recall tasks and open questions, we collected their recall of stories, specific passages, recurring topics and general interpretation to assess the processes of reticulation (i.e. searching for recurring elements in stories) and modification (i.e. modifying initial hypotheses based on the identification of new elements) advanced by Audet (2014). This confrontation revealed noticeably disagreeing results. Our findings suggest that flesh-and-blood readers adopt a more straightforward and intuitive approach when reading and interpreting collections as they are subject to a strong primacy effect, privilege personal appreciation of specific stories and passages, and rely on a disinclination to alter initial interpretative hypotheses. The findings pave the way for further investigation into the readers of SSCs.