The Role of Switching,Inhibition and Working Memory in Older Adults' Performance in the Wisconsin Card Sorting Test

ABSTRACT

The Wisconsin Card Sorting Test (WCST) is considered a typical executive test. However, several interesting questions are still open as to the specific executive processes underlying this task. In the present study, we explored how local and global switching, inhibition and working memory, assessed through the Number–Letter, the Stop Signal and the Reading Span tasks, relate to older adults' performance in the WCST. Results showed that older adults' performance variability in the number of perseverative errors was predicted by the local switch component of the Number–Letter task. Results also showed age-related differences in inhibition, working memory and global switching, while local switching resulted largely spared in aging. This study provides evidence that switching abilities may contribute to performance of older adults in the WCST. It also provides initial evidence suggesting that switching processes, associated with local switch costs, are involved in performance on the WCST, at least in older adults.     

Dyadic Flexibility in Early Parent–Child Interactions: Relations with Maternal Depressive Symptoms and Child Negativity and Behaviour Problems

Lower levels of parent–child affective flexibility indicate risk for children's problem outcomes. This short‐term longitudinal study examined whether maternal depressive symptoms were related to lower levels of dyadic affective flexibility and positive affective content in mother–child problem‐solving interactions at age 3.5 years (N = 100) and whether these maternal and dyadic factors predicted child emotional negativity and behaviour problems at a 4‐month follow‐up. Dyadic flexibility and positive affect were measured using dynamic systems‐based modelling of second‐by‐second affective patterns during a mother–child problem‐solving task. Results showed that higher levels of maternal depressive symptoms were related to lower levels of dyadic affective flexibility, which predicted children's higher levels of negativity and behaviour problems as rated by teachers. Mothers' ratings of child negativity and behaviour problems were predicted by their own depressive symptoms and individual child factors, but not by dyadic flexibility. There were no effects of dyadic positive affect. Findings highlight the importance of studying patterns in real‐time dyadic parent–child interactions as potential mechanisms of risk in developmental psychopathology. Copyright © 2012 John Wiley & Sons, Ltd.     

Development of Children's Awareness of Their Own Thoughts

Adults attach special value to objects that link to notable people or events—authentic objects. We examined children's monetary evaluation of authentic objects, focusing on four kinds: celebrity possessions (e.g., Harry Potter's glasses), original creations (e.g., the very first teddy bear), personal possessions (e.g., your grandfather's baseball glove), and merely old items (e.g., an old chair). Children ages 4 to 12 years old and adults (N = 151) were asked how much people would pay for authentic and control objects. Young children consistently placed greater monetary value on celebrity possessions than on original creations, even when adults judged the two kinds of items to be equivalent. These results suggest that contact with a special individual may be the foundation for the value placed on authentic objects.     

Public Science of the Savage Mind: Contesting Cultural Anthropology in the Cold War Classroom

“What is human about human beings? How did they get that way? How can they be made more so?” These three questions formed the basis of a fifth‐grade social studies curriculum project developed in the 1960s called Man: A Course of Study, or MACOS. In the years between the curriculum's development in the 1960s and its controversial implementation in the 1970s, two separate sets of concerns served to problematize the use of anthropological materials in public school classrooms. On the one hand, MACOS designers were wary of the possibly racist interpretations of exploring so‐called “primitive” cultures in the classroom. On the other, conservative textbook reformers objected to claims that all cultural solutions to biological problems were morally equivalent. Once MACOS earned a place in national news, it came to embody both hopes for the redemption of American democratic society and fears about the violent nature of humans, depending on one's political perspective. These mixed messages eventually undermined the long‐term success of the program as public science.     

Cross-language lexical connections in the mental lexicon: evidence from a case of trilingual aphasia

Despite anecdotal data on lexical interference among the languages of multilingual speakers, little research evidence about the lexical connections among multilinguals' languages exists to date. In the present paper, two experiments with a multilingual speaker who had suffered aphasia are reported. The first experiment provides data about inter-language activation during natural conversations; the second experiment examines performance on a word-translation task. Asymmetric patterns of inter-language interference and translation are evident. These patterns are influenced by age of language learning, degree of language recovery and use, and prevalence of shared lexical items. We conclude that whereas age of language learning plays a role in language recovery following aphasia, the degrees of language use prior to the aphasia onset and of shared vocabulary determine the ease with which words are accessed. The findings emphasize the importance of patterns of language use and the relations between the language pair under investigation in understanding lexical connections among languages in bilinguals and multilinguals.     

Getting by with a little help from self and others: self-esteem and social support as resources during early adolescence

Influences of social support and self-esteem on adjustment in early adolescence were investigated in a 2-year longitudinal study (N = 350). Multi-informant data (youth and parent) were used to assess both overall levels and balance in peer- versus adult-oriented sources for social support and self-esteem. Findings obtained using latent growth-curve modeling were consistent with self-esteem mediating effects of social support on both emotional and behavioral adjustment. Lack of balance in social support and self-esteem in the direction of stronger support and esteem from peer-oriented sources predicted greater levels and rates of growth in behavioral problems. Results indicate a need for process-oriented models of social support and self-esteem and sensitivity to patterning of sources for each resource relative to adaptive demands of early adolescence.     

Power in randomized group comparisons: the value of adding a single intermediate time point to a traditional pretest-posttest design

Adding a pretest as a covariate to a randomized posttest-only design increases statistical power, as does the addition of intermediate time points to a randomized pretest-posttest design. Although typically 5 waves of data are required in this instance to produce meaningful gains in power, a 3-wave intensive design allows the evaluation of the straight-line growth model and may reduce the effect of missing data. The authors identify the statistically most powerful method of data analysis in the 3-wave intensive design. If straight-line growth is assumed, the pretest-posttest slope must assume fairly extreme values for the intermediate time point to increase power beyond the standard analysis of covariance on the posttest with the pretest as covariate, ignoring the intermediate time point.     

Conceptual and methodological issues in the judgment of facial expressions of emotion

In two studies, subjects judged a set of facial expressions of emotion by either providing labels of their own choice to describe the stimuli (free-choice condition), choosing a label from a list of emotion words, or choosing a story from a list of emotion stories (fixed-choice conditions). In the free-choice condition, levels of agreement between subjects on the predicted emotion categories for six basic emotions were significantly greater than chance levels, and comparable to those shown in fixed-choice studies. As predicted, there was little to no agreement on a verbal label for contempt. Agreement on contempt was greatly improved when subjects were allowed to identify the expression in terms of an antecedent event for that emotion rather than in terms of a single verbal label, a finding that could not be attributed to the methodological artifact of exclusion in a fixed-choice paradigm. These findings support two conclusions: (1) that the labels used in fixed-choice paradigms accurately reflect the verbal categories people use when free labeling facial expressions of emotion, and (2) that lexically ambiguous emotions, such as contempt, are understood in terms of their situational meanings.This research was supported in part by a Research Scientist Award from the National Institute of Mental Health (MH 06091) to Paul Ekman.     

Body image and dieting failure in college men and women: Examining links between depression and eating problems

The noted co-occurrence between depression and eating problems in women may be due to their common association with negative body image. Specifically, the western cultural ideal that equates feminine beauty with thinness leads a large number of women to be dissatisfied with their bodies. A recent model [M. McCarthy (1990) The Thin Ideal, Depression, and Eating Disorders in Women, Behavioral Research and Therapy, Vol. 28, pp. 205–215] suggests that this dissatisfaction, coupled with high importance placed on appearance, leads most women to engage in dieting to obtain this level of thinness. As dieting is typically unsuccessful as a means of long-term weight control, depression will result from the sense of failure and helplessness associated with dieting failure. This depression then leads to increasingly maladaptive eating behaviors that serve to assuage negative affect and regain control over body appearance. In a sample of 234 male and female, predominantly white, 17–22-year-old college students, we examined several components of this model, including the specificity of these relations for women. In accordance with the model, depressive symptoms and eating problems were predicted to be an interactive function of body image and body image importance, with negative body image/high importance subjects showing the greatest disturbance. In addition, we examined several components of the model to determine (a) the relation between failed dieting and depression, and (b) the extent to which depression could account for eating problems. Regardless of gender, eating problems were indeed highest among those with both negative body image and high body image importance. Depression, however, was higher in subjects with negative body image, regardless of body image importance. For both men and women, failed dieting was significantly related to depression, but only for women did depression account for significant variability in eating problems. Validity of the model is considered. Gender differences in the nature of these relations, and the need to consider possible alternative effects of the cultural standard for masculine attractiveness, are discussed.This research is based in part on an undergraduate honor's thesis submitted by the second author to the Emory University Department of Psychology under the direction of the first author. Funding was provided by a grant from Emory University to the first author. The authors would like to thank Robyn Fivush, Steven Nowicki, Irwin Waldman, Carol Worthman, and two anonymous reviewers for helpful comments on earlier drafts.