Dynamic categorization and slot-filler representation in 4- and 6-year-old children

This experiment was aimed at studying both the role of narrow/contextualized categories in the acquisition/organization of conceptual knowledge and the dynamics of categorization decisions. A forced-choice categorization task contrasting thematic and taxonomic responding was used in 4- and 6-year-old children. Before response alternatives were presented, a conceptual organization was pre-activated by means of a matching between the target stimulus and a thematically related, taxonomically related or slot-filler related object. Although taxonomic sorting was prominent overall, it varied as a function of age and of the nature of the pre-activated relation. Responses in accordance with the thematic or taxonomic activations occurred similarly in 4- and 6-year-old children. Age-related effects were however at work in the case of a slot-filler activation: 4-year-old children considered the contextual/contiguity relations between the stimuli but did not weight the equivalence relations (i.e., same occurrence of responses based on the kind of object in the slot-filler and in the thematic activation conditions). More diversified processes appeared to be at work in 6-year-old children. Slot-filler categories were this time considered throughout both their contextual/contiguity structure and their equivalence relations. Results were discussed in terms of availability of conceptual organizations, flexibility abilities, dynamic categorization and preferences. The focus was on implication of slot-filler representations in the construction of conceptual knowledge and in the development of categorization. An important point was to determine whether the age-related changes observed in the slot-filler activation condition could be consistent with Nelson's ( 1983 ) idea that slot-fillers would help passing from a schema-based to a conventional superordinate organization.     

Children dating childhood memories

How accurate are children when dating very long-term memories? Chinese and European Canadian 8-, 11-, and 14-year-olds (N=344) recalled and dated memories from before they went to school in a memory fluency task. Parents provided verification of children's memories and age estimates. Across all age and culture groups, a telescoping effect (i.e., events were dated as taking place more recently than they actually did) was found for earlier memories (before 48 months) and a reverse telescoping effect for later memories (after 48 months). Older children showed a greater tendency to telescope earlier memories and a weaker tendency to reverse telescope later memories than did younger children. Euro-Canadian children showed larger reverse telescoping than Chinese children. These are the first systematic findings concerning the accuracy of children's dating of very long-term memories. They shed new light on the phenomenon of telescoping and have implications for research on childhood amnesia.     

Negative processing biases predict subsequent depressive symptoms

This study investigated the possible relationship between negative processing biases and subsequent depression. The Scrambled Sentences Test (SST), a measure of processing bias, was administered to a large sample of undergraduates. Participants also completed self-report measures of thought suppression tendencies, current level of depression, and lifetime worst-depression symptoms. High scores on the SST, reflecting a negative processing bias, predicted depression symptoms measured 4 to 6 weeks later, even after controlling for concurrent and past depression. The SST was administered both with and without cognitive load to all participants. The SST with load predicted subsequent depression for both men and women. The SST without load predicted depression for women only. The SST difference score, a measure of the change in scores between the no-load and load conditions, was a significant predictor of subsequent depression for men but not women. Among men, the combination of high thought suppression with either high SST-load scores or high SST difference scores proved to be a particularly strong indicator of vulnerability to subsequent depression.     

Conceptions of criminal and delinquent acts

We estimate a series of multivariate logistic regression models specifying the effects of gender and other variables on the initiation and escalation of alcohol and other substance use/abuse in a sample of young adults from a general population. After controlling for race, ethnicity, father's education, and a tendency to over‐ or underendorse statements, effects of gender on circumstances surrounding initiation/escalation of binge drinking, marijuana use, and use of other illicit drugs were observed to be congruent with the literature on gender‐related sociodevelopmental processes and empirical studies of the circumstances surrounding substance use. Among substance users/abusers, gender was implicated in self‐reports of the relevance of peer influence, needs to enhance self‐importance and a sense of power, conflictive consequences, sensation‐seeking, and reduction of distress in the processes surrounding initiation and escalation of use.     

Relational and Social Aggression and Reflective Processing in a University Sample

This study examined whether the dimension of reflective processing (e.g., deep and elaborative processing) was connected to the use of relational aggressions, social aggression, or both. A convenience sample of 629 college students (66% female, 91.6% White) was surveyed to ascertain the relation between self-reported relational and social aggression and deep and elaborative processing. The overall multivariate regression model was significant, Wilks’s λ = .12, F(4, 2162) = 1010.80, p < .001. Univariate results were used to show that the two predictors (relational and social aggression) significantly and strongly positively predicted the use of deep processing, R² = .81, p < .001, as well as the use of elaborative processing, R² = .87, p < .001. In summary, higher levels of social and relational aggression were related to higher levels of deep and elaborative processing. Implications for these findings are presented.     

Gender differences in perceptions of normal body weights

The current study employed an alternative methodology to assess perceptions of normal range body weight. Male and female undergraduates were asked to give weight ranges for male and female targets, rather than use figure silhouettes. Male respondents felt that lighter weights in men and women were more normal. Female participants believed that heavier weight ranges were normal, both for themselves and for men. Despite this, women were no more likely than men to report being overweight and to be dieting. Future studies should utilize both figure silhouette drawings and acceptable weight range estimates to determine the influence of methodology on reported findings.     

Confusable gratings selectively elicit orientation-contingent colour aftereffects

Induction of orientation-selective colour aftereffects (the McCollough effect) was studied with groups of young children who differed in their ability to discriminate an oblique grating from its mirror-image under recognition conditions. If the McCollough effect is generated through associative learning, children who failed to learn simple identifying responses to oblique lines as a function of the direction in which the lines point should also fail to associate colour lablels selectively to these same stimuli. Instead, the ease with which the McCollough effect was induced by alternate exposure to left-oblique lines in green light and right-oblique lines in red light was independent of the ability of the young child to discriminate direction of line under recognition conditions.