Strategy Choice in Sociocultural Context

Historically, research on strategy development has focused on charting changes in modal strategy use associated with age and experience. In recent years, however, researchers have begun to document the variety of strategies children have in their repertoires at different ages and with different degrees of experience on tasks. Of growing importance is understanding the processes by which children choose among available approaches. In this paper, I review evidence that sociocultural influences play a powerful role in shaping both the repertoires of strategies individuals have available to solve problems, and the choices they make among those strategies.     

The emotional impact of faces (but not names): Face specific changes in skin conductance responses to familiar and unfamiliar people

Skin Conductance Responses (SCRs) to familiar and unfamiliar names and faces were recorded from independent groups of subjects, using two different presentation designs: the first employing fewer familiar than unfamiliar items (Tranel, Fowles, and Damasio, 1985) and the second employing equal numbers of familiar and unfamiliar items. In both designs, familiar faces were responded to significantly more strongly than unfamiliar faces, whereas for names there was no difference in responses to familiar and unfamiliar stimuli. Faces produced significantly larger overall SCRs than names in the unequal familiar/unfamiliar ratio design, but this effect was not observed in the equal ratio design. The results are discussed with particular reference to those previously published by Tranel et al. (1985) and in relation to work both on covert recognition in prosopagnosia and on one of the delusional misidentification syndromes known as the Capgras delusion. This study was carried out with generous support from the EJLB Foundation (Canada) and the Wellcome Trust.     

The Potential Mediating Role of Parenting Practices in the Development of Conduct Problems in a Clinic-Referred Sample

Research has consistently found associations among parenting practices, socioeconomic disadvantage, ethnicity and conduct problems in children. We investigated whether parenting practices might mediate the relation between ethnicity and conduct problems and the relation between socioeconomic status (SES) and conduct problems. The subjects were 141 clinic-referred children between the ages of 6 and 17 and their primary custodial parents. Using multiple indicators for each construct, except ethnicity, the mediational role of parenting was tested using structural equation modeling. The results indicated that the effects of SES on conduct problems was largely mediated by the influence of ineffective parenting practices. In contrast, ethnicity was not associated with conduct problems in this clinic-referred sample, even prior to controlling for SES and parenting practices, suggesting that the link between minority status and conduct problems may be dependent on the demographic characteristics of the sample. Exploratory analyses also revealed that there were ethnic differences in the types of parenting practices that were most strongly associated with conduct problems.     

Parallel processing in item recognition

It is shown that in Sternberg’s item recognition task Ss need not make a judgment of the absolute size or color of the test item before comparing it with memory. However, Ss do use size or color information, when possible, to reduce long reaction times for large memory loads. The results suggest that Ss are able to scan memory for form in parallel with testing for gross stimulus features, like size or color. This finding has important implications for sequential two-stage theories of attention.     

Matching familiar and unfamiliar faces on internal and external features

Two experiments are reported in which subjects were asked to match a photograph of a complete face and a simultaneously presented photograph of internal or external features of a face, deciding whether or not the two photographs were pictures of the same person. In experiment 1 'same' pairs were derived from different pictures of the same face, so that subjects had to match the faces and not the particular photographs used. Matches based on internal features were found to be faster for familiar than for unfamiliar faces, whereas there was no difference in reaction time between matches based on the external features of familiar and unfamiliar faces. Faster matching of internal features of familiar faces was found to hold equally for pairs of photographs that differed in orientation of the face or in facial expression. In experiment 2 'same' pairs were derived from the same photographs, which gave subjects the choice of matching on the basis of the features of the depicted faces or matching the photographs. Reaction times were faster than in experiment 1, and there were no differences between familiar and unfamiliar faces. The study confirms reports of differential saliency of the internal features of familiar faces, and shows that this only holds when stimuli are treated as faces. The finding thus reflects properties of structural rather than pictorial codes.     

Forgetting in retarded and nonretarded persons under conditions of minimal strategy use

Short-term memory processes of mentally retarded (mild, moderate, and severe) and nonretarded persons were compared in a delayed matching-to-sample task that minimized the use of verbal rehearsal. In addition to trials with delays up to 20 s, the inclusion of trials on which the sample and comparison stimuli occurred simultaneously made it possible to isolate memory and discriminability. Forgetting was most pronounced between the simultaneous and 0-s conditions, and nonretarded subjects forgot less than retarded subjects between these conditions. There were no group differences beyond the 0-s delay. Ease of strategy use failed to account for individual differences, and reported strategy use was not related systematically to performance. These findings are incompatible with the hypothesis that normal-retarded differences occur only on tasks involving effortful cognitive strategies. Differences between nonretarded and retarded groups in this study may be due to a failure in automatic encoding processes in retarded persons.     

Family structure and dating behavior of adolescents

This study investigated the effect of family structure on previous dating behavior of older adolescents, and examined the relationship of family structure, family relationship variables, and personal attributes to previous dating behaviors. Data were obtained from 96 males and 81 females enrolled in human development courses at two midwestern universities; 122 were from intact, nuclear families and 55 were from nonintact families. The Dating and Courtship Behavior Questionnaire, adapted from questionnaires by Winch (1949a) and Landis (1963), was administered to subjects during regular class periods. Family structure did not have an effect on number of partners or steadies, but adolescents from nonintact households began dating at younger ages than those from intact households. Personal attributes were more often related to dating behaviors than family structure or family relationship variables. Little support was found for the proposition that dating behaviors were affected by family structure.