Interaction between amount and pattern of training in the induction of intermediate- and long-term memory for sensitization in aplysia

In Aplysia, three distinct phases of memory for sensitization can be dissociated based on their temporal and molecular features. A single training trial induces short-term memory (STM, lasting <30 min), whereas five trials delivered at 15-min intervals induces both intermediate-term memory (ITM, lasting >90 min) and long-term memory (LTM, lasting >24 h). Here, we explore the interaction of amount and pattern of training in establishing ITM and LTM by examining memory for sensitization after different numbers of trials (each trial = one tail shock) and different patterns of training (massed vs. spaced). Under spaced training patterns, two trials produced STM exclusively, whereas four or five trials each produced both ITM and LTM. Three spaced trials failed to induce LTM but did produce an early decaying form of ITM (E-ITM) that was significantly shorter and weaker in magnitude than the late-decaying ITM (L-ITM) observed after four to five trials. In addition, E-ITM was induced after three trials with both massed and spaced patterns of training. However, L-ITM and LTM after four to five trials require spaced training: Four or five massed trials failed to induce LTM and produced only E-ITM. Collectively, our results indicate that in addition to three identified phases of memory for sensitization—STM, ITM, and LTM—a unique temporal profile of memory, E-ITM, is revealed by varying either the amount or pattern of training.     

How others respond to non‐suicidal self‐injury disclosure: A systematic review

Non‐suicidal self‐injury (NSSI) is an increasing health concern. Despite the potential benefits of disclosing the behaviour, many decide not to do so because of the fear of negative social reactions. In this review, we examined the existing research on reported and perceived reactions to NSSI disclosure with the aim of identifying how an individual who discloses their NSSI perceives others' responses to this disclosure, with the ultimate goal of understanding how these reactions may impact those who disclose their NSSI. Among the initial 275 studies, 10 fit the inclusion criteria. Three studies reported perceived responses by individuals who had disclosed their NSSI; six studies examined self‐reported responses by others; one study focused on disclosures online. Individuals who disclosed their NSSI often received negative responses, which caused them to withdraw from seeking further help. On the other hand, recipients' reactions to NSSI disclosure varied based on NSSI characteristics such as its perceived cause and/or underlying motivation. Results highlight the importance of providing support rather than searching for the underlying drives of NSSI.     

Mere social knowledge impacts children's consumption and categorization of foods

How does social information affect the perception of taste early in life? Does mere knowledge of other people's food preferences impact children's own experience when eating? In Experiment 1, 5‐ and 6‐year‐old children consumed more of a food described as popular with other children than a food that was described as unpopular with other children, even though the two foods were identical. In Experiment 2, children ate more of a food described as popular with children than a food described as popular with adults. Experiment 3 tested whether different perceptual experiences of otherwise identical foods contributed to the mechanisms underlying children's consumption. After sampling both endpoints of a sweet‐to‐sour range (applesauce with 0 mL or 5mL of lemon juice added), children were asked to taste and categorize applesauce samples with varying amounts of lemon juice added. When classifying ambiguous samples that were near the midpoint of the range (2 mL and 3 mL), children were more likely to categorize popular foods as sweet as compared to unpopular foods. Together, these findings provide evidence that social information plays a powerful role in guiding children's consumption and perception of foods. Broader links to the sociality of food selection are discussed.     

Older adults’ neural activation in the reward circuit is sensitive to face trustworthiness

We examined older adult (OA) and younger adult (YA) neural sensitivity to face trustworthiness in reward circuit regions, previously found to respond to trustworthiness in YA. Interactions of face trustworthiness with age revealed effects exclusive to OA in the amygdala and caudate, and an effect that was not moderated by age in the dorsal anterior cingulate cortex (dACC). OA, but not YA, showed a nonlinear amygdala response to face trustworthiness, with significantly stronger activation response to high than to medium trustworthy faces, and no difference between low and medium or high. This may explain why an earlier study investigating OA amygdala activation to trustworthiness failed to find a significant effect, since only the linear low versus high trustworthiness difference was assessed. OA, but not YA, also showed significantly stronger activation to high than to low trustworthy faces in the right caudate, indicating a positive linear effect, consistent with previous YA research, as well as significantly stronger activation to high than to medium but not low trustworthy faces in the left caudate, indicating a nonlinear effect. Activation in dACC across both age groups showed a positive linear effect consistent with previous YA research. Finally, OA rated the faces as more trustworthy than did YA across all levels of trustworthiness. Future research should examine whether the null effects for YA were due to our inclusion of older faces. Research also should investigate possible implications of our findings for more ecologically valid OA responses to people who vary in facial trustworthiness.     

Topographies and functions of emerging problem behavior and appropriate requests in neurotypical preschoolers

The current study builds on a small but growing body of research evaluating the formal and functional characteristics of emerging problem behavior before it becomes harmful and requires costly treatment. The researchers tested 21 preschool children's sensitivity to establishing operations that commonly precede severe problem behavior. Sensitivity tests were embedded in a small group play context to optimize safety, efficiency, and ecological validity. The tests screened several levels of problem-behavior severity as well as the presence of adaptive alternatives (i.e., communication) to problem behavior. Overall, outcomes suggested sources of reinforcement for minor- and moderate-severity problem behavior in 86% of children. Only 17% of children exhibiting problem behavior also engaged in appropriate requests in the same condition(s) as problem behavior. The present data are compared to published functional analyses of severe behavior. The results are discussed as a preliminary step towards a function-based model of risk identification and behavioral prevention of severe problem behavior.     

Fairness Reactions to Personnel Selection Methods: A look at professionals in Mumbai,India

This study expands upon Steiner and Gilliland's selection fairness research. Professionals (N = 114) from Mumbai, India rated 12 employee selection methods on favorability and provided the bases for those ratings. In line with previous research, interviews and resumes were rated most favorably, while graphology and honesty tests were rated least favorably. Perceived face validity, opportunity to perform, and widespread use of selection methods were highly correlated with favorability ratings, while interpersonal warmth, scientific evidence, and respectful of privacy exhibited weak correlations with favorability ratings. Work sample tests, which have previously been rated favorably, were rated unfavorably. Exploratory analysis showed that participants viewed assessment centers favorably and online information unfavorably. Outcome favorability was highly correlated with favorability ratings.     

Low Rates of African American Participation in Genetic Counseling and Testing for BRCA1/2 Mutations: Racial Disparities or Just a Difference?

Low rates of genetic counseling among African American women have generated concerns about disparities; however, to the extent that women's decisions to accept or decline counseling are consistent with their values, then lower participation may reflect preferences and not disparities. We evaluated the extent to which women were satisfied with their decision about participating in genetic counseling for BRCA1/2 mutations and identified variables that were associated significantly with satisfaction. Prospective study of decision satisfaction with 135 African American women who had a minimum 5% prior probability of having a BRCA1/2 mutation. Decision satisfaction was evaluated one month after women were offered participation in genetic counseling using a structured questionnaire. Women were satisfied with their participation decision; more than 80% reported that their decision was consistent with their family values. However, women who declined pre-test counseling had significantly lower satisfaction scores. Our findings highlight the importance ensuring that racial differences that are due to preferences and values are not misclassified as disparities in order to identify and address the root causes of disparate treatment.     

The interplay between executive control and motor functioning in Williams syndrome

Previous studies suggest that individuals with Williams syndrome (WS), a rare genetically based neurodevelopmental disorder, show specific weaknesses in visual attention and response inhibition within the visuospatial domain. Here we examine the extent to which impairments in attentional control extend to the visuomotor domain using a well‐validated measure of choice stepping reaction time (CSRT) in individuals with WS. We examined the interaction between executive control and visually guided stepping using a verbal fluency dual‐task or Go/NoGo paradigm during CSRT performance. Relationships between dual‐task and inhibitory stepping and behavioural inattention and hyperactivity were also examined. Our results showed clear dual‐task costs in stepping response times when performing a concurrent cognitive task in the WS group when compared to spatial and verbal ability matched typically developing controls. Although no group differences in stepping accuracy were observed between the WS and typically developing control groups, the WS group showed progressive slowing and more variable response times across the duration of the Go/NoGo task. These results suggest dysfunction in circuits involved in top‐down attentional control processes in WS. These findings provide novel evidence that core executive control deficits in WS extend to the visuomotor domain, and impact on ADHD‐related inattentive symptoms.