Atypical shape bias and categorization in autism: Evidence from children and computational simulations

The shape bias, a preference for mapping new word labels onto the shape rather than the color or texture of referents, has been postulated as a word‐learning mechanism. Previous research has shown deficits in the shape bias in children with autism even though they acquire sizeable lexicons. While previous explanations have suggested the atypical use of color for label extension in individuals with autism, we hypothesize an atypical mapping of novel labels to novel objects, regardless of the physical properties of the objects. In Experiment 1, we demonstrate this phenomenon in some individuals with autism, but the novelty of objects only partially explains their lack of shape bias. In a second experiment, we present a computational model that provides a developmental account of the shape bias in typically developing children and in those with autism. This model is based on theories of neurological dysfunctions in autism, and it integrates theoretical and empirical findings in the literature of categorization, word learning, and the shape bias. The model replicates the pattern of results of our first experiment and shows how individuals with autism are more likely to categorize experimental objects together on the basis of their novelty. It also provides insights into possible mechanisms by which children with autism learn new words, and why their word referents may be idiosyncratic. Our model highlights a developmental approach to autism that emphasizes deficient representations of categories underlying an impaired shape bias.     

PSYCHOLOGICAL ABUSE, SELF-ESTEEM, AND WOMEN'S DATING RELATIONSHIP OUTCOMES

Self-verification theory implies that people with negative self-views may be drawn to abusive partners who mistreat them. However, abusive partner behavior differs from the types of partner feedback typically examined within a self-verification framework, which could render generalization to abuse problematic. We propose that self-enhancement theory better accounts for the effects of abuse on relationship outcomes. Self-enhancement theory suggests that people are drawn to others who treat them favorably, regardless of people's own self-views. We investigated the effects of abusive feedback from dating partners, relative to women's Self-esteem levels, on relationship intimacy and stability. Predictions based on both self-verification and self-enhancement theories were tested cross-sectionally and with a subsample of women 6 weeks after the initial assessment. Results were most consistent with self-enhancement theory; partner abuse was related to lesser relationship stability and intimacy. More limited support was obtained for self-verification theory. Importantly, women with lower self-esteem did not endorse greater stability or intimacy as a function of receiving psychological abuse. We conclude that self-enhancement theory better explains the link between psychological abuse and relationship outcomes, although self-verification theory may account for reactions to other types of partner behavior.     

Assessment of perceptual discrepancy: utility of the Primary Communication Inventory

The Primary Communication Inventory was factor-analyzed in order to validate the subscales of this instrument. These subscales were derived by Navran (20) on the basis of face validity and were labeled verbal and nonverbal communication subscales. The analysis yielded two factors. However, they could not be labeled verbal and nonverbal. Instead, the factors were interpreted as: (a) the individual's perceptions of own communication ability, and (b) the spouse's perceptions of the individual's communication ability. The scoring of the Primary Communication Inventory was revised and used as a measure of perceptual discrepancy between husbands and wives. Interestingly, discrepancy within the marital dyad was greater for the nondistressed participants than for the distressed participants. The results illustrate the potentially adaptive nature of positive perceptual distortion within the marital dyad and the potential utility for future research of calculating perceptual discrepancy scores for each spouse using the Primary Communication Inventory.     

Impact of fathers' alcoholism and associated risk factors on parent–infant attachment stability from 12 to 18 months

This study examined short‐term attachment stability and sought to identify predictors of stability and change within a sample characterized by fathers' alcoholism. Results suggest moderate stability of attachment classifications (60% for mothers, 53% for fathers) from 12 to 18 months. Higher paternal and maternal alcohol symptoms, maternal depression, and maternal antisocial behavior were found in families with stable insecure mother–infant attachment compared to those who were stable secure. Mother–infant stable insecurity was associated with higher levels of maternal negative affect expression during play. Father–infant stable insecurity was associated with lower levels of paternal positive affect expression and decreased sensitivity during play. Stable insecure children also had higher levels of negative affect during parent–infant interactions and higher negative emotionality during other episodes compared to stable secure children. Results indicate that infants who were insecure at both time points had the highest constellation of family risk characteristics.     

Leadership and the management of conflicts in diverse groups: Why acknowledging versus neglecting subgroup identity matters

Past research suggests that reactions to an authority's decision are most influenced by treatment quality when individuals value their relationship with the authority and the group s/he represents. The present experiments examine how institutional recognition of self‐relevant identities (implicit in Study 1 and explicit in Study 2) affects the relationship between treatment quality and reactions to the delivery of a negative outcome by an outgroup authority. The overall pattern of results suggests that treatment quality affects reactions to the decision only when the common identity shared with the authority and a subgroup identity that distinguishes one from the authority are both recognized. Possible mechanisms for the observed effect are discussed along with implications for the dual identity approach to conflict resolution. Copyright © 2004 John Wiley & Sons, Ltd.     

Teaching Principal Components Using Correlations

Introducing principal components (PCs) to students is difficult. First, the matrix algebra and mathematical maximization lemmas are daunting, especially for students in the social and behavioral sciences. Second, the standard motivation involving variance maximization subject to unit length constraint does not directly connect to the “variance explained” interpretation. Third, the unit length and uncorrelatedness constraints of the standard motivation do not allow re-scaling or oblique rotations, which are common in practice. Instead, we propose to motivate the subject in terms of optimizing (weighted) average proportions of variance explained in the original variables; this approach may be more intuitive, and hence easier to understand because it links directly to the familiar “R-squared” statistic. It also removes the need for unit length and uncorrelatedness constraints, provides a direct interpretation of “variance explained,” and provides a direct answer to the question of whether to use covariance-based or correlation-based PCs. Furthermore, the presentation can be made without matrix algebra or optimization proofs. Modern tools from data science, including heat maps and text mining, provide further help in the interpretation and application of PCs; examples are given. Together, these techniques may be used to revise currently used methods for teaching and learning PCs in the behavioral sciences.     

The development of attentional orienting during the school‐age years

This study was designed to assess the development of spatial attentional orienting during the school‐age years. To that end, we used a cost‐benefit attentional cueing task with short (100 ms) and long (800 ms) cue‐to‐target intervals to examine attentional processing independent of motor skills and perceptual processing in 200 7–17‐year‐olds and 40 adults. We found that orienting attention, disengaging attention and visual processing in an unattended location, were all progressively more accurate and faster with increasing age. Our data thus suggest that the efficiency of attentional orienting improves in an age‐related manner throughout the school‐age years.     

Brain c-Fos immunocytochemistry and cytochrome oxidase histochemistry after a fear conditioning task

The involvement of the basolateral and the medial amygdala in fear conditioning was evaluated using different markers of neuronal activation. The method described here is a combination of cytochrome oxidase (CO) histochemistry and c-Fos immunocytochemistry on fresh frozen brain sections. Freezing behavior was used as an index of auditory and contextual fear conditioning. As expected, freezing scores were significantly higher in rats exposed to tone-shock pairings in a distinctive environment (conditioned; COND), as compared to rats that did not receive any shocks (UNCD). CO labeling was increased in the basolateral and medial amygdala of the COND group. Conversely, c-Fos expression in the basolateral and medial amygdala was lower in the COND group as compared to the UNCD group. Furthermore, c-Fos expression was particularly high in the medial amygdala of the UNCD group. The data provided by both techniques indicate that these amygdalar nuclei could play different roles on auditory and contextual fear conditioning.     

Psychometric properties of the d2 selective attention test in a sample of premature and born-at-term babies

The psychometric properties of the d2 Selective Attention Test are analyzed in two samples of premature ( n = 63) and born-at-term ( n = 78) children. The reliability coefficients (internal consistency) reached values of around .90. Principal components analysis revealed a three-factor structure, which accounts for 58% of the variance, and thus coincides with the number of factors presented in the manual of the Spanish adaptation of the test but not with their composition. Results suggest that the d2 test has adequate psychometric properties both for the global sample and for each sub-sample.