Historical materialism and Capital

It is commonly supposed that Marx's Capital is part and parcel of his theory of historical materialism. It is argued here, however, that this view is incorrect, and that Capital is distinguished from the more general theory of historical materialism in its standing as a work of social science. This conclusion rests on several grounds. First, Capital is substantially more specialized than the theory of historical materialism, since it is concerned only with one aspect of one mode of production. As a result, Capital provides a more rigorous treatment of its subject matter. Second, Capital is based on a fund of empirical evidence which is substantially more detailed than that offered in support of the theses of historical materialism. And third, given the preceding points, Capital is a developed empirical theory, whereas historical materialism is best construed as a general program of research. For these reasons Capital is epistemically distinct from historical materialism: unlike the latter, it is a substantive contribution to social science.     

Parental Involvement in Elite Junior Slalom Canoeing

This study's aim was to examine elite youth athletes’ views on parental involvement in training, competition, and at home. Eight canoeists were interviewed up to 4 times and completed written diaries over a 6-week period. Results indicated that parents were generally deemed to have a positive influence through domain specific and cross-domain behaviors. Positive behaviors included parents focusing on their children's holistic development at home, motivational and constructive evaluation at training, and limiting demands on athletes through the provision of practical support, reading and understanding the situation and their child, and supporting the development of growth mind-set across all domains.     

The contributions of convergent thinking,divergent thinking,and schizotypy to solving insight and non-insight problems

The ability to generate diverse ideas (divergent thinking) is valuable in solving creative problems (e.g., insight problems); yet, however advantageous, this ability is insufficient to solve the problem alone and requires the ability to logically deduce an assessment of correctness of each solution (convergent thinking). Positive schizotypy may help isolate the aspects of divergent thinking prevalent in insight problem solving. Participants were presented with a measure of schizotypy (Oxford-Liverpool Inventory of Feelings and Experiences), divergent and convergent thinking tasks, insight problems, and non-insight problems. We found no evidence for a relationship between schizotypy and insight problem solving. Relationships between divergent thinking and insight problem solving were also surprisingly weak; however, measures of convergent thinking had a stronger relationship with problem solving. These results suggest that convergent thinking is more important than divergent thinking in problem solving.     

Caregivers’ Positive Emotional Expression and Children’s Psychological Functioning after Parental Loss

The death of a loved one, particularly a parent, has been identified as not only the most common, but also the most distressing form of adversity youth may experience in their lifetime. Surviving caregivers’ communication with their children may play a critical role in shaping bereaved children’s psychological functioning. However, few studies have examined the specific content (e.g., word usage) of caregivers’ verbal communication as a predictor of psychological functioning in bereaved youth. In a sample of 39 parentally-bereaved children and their surviving caregivers, we investigated whether the frequency of caregivers’ use of positive emotion words (e.g., “love”, “happy”, “hope”) during a reminiscing task about the deceased was associated with children’s psychological functioning and coping. In a cross-sectional analysis, we specifically examined whether these associations were moderated by the amount of time passed since children lost their parents. The Linguistic Inquiry and Word Count Program (LIWC) was used to code and evaluate the percentage of positive emotion words caregivers used during the discussion. When caregivers used more positive emotion words, children were less likely to experience depression, anxiety, and avoidant coping. Those associations were present for children who had experienced parental loss at least 105 days prior to the study.     

Factor structure and aetiological architecture of the BRIEF: A twin study

Executive function is a broad construct that encompasses various processes involved in goal‐directed behaviour in non‐routine situations (Banich, 2009). The present study uses a sample of 560 5‐ to 16‐year‐old twin pairs (M = 11.14, SD = 2.53): 219 monozygotic twin pairs (114 female; 105 male) and 341 dizygotic twin pairs (136 female, 107 male; 98 opposite sex) to extend prior literature by providing information about the factor structure and the genetic and environmental architecture of the Behavior Rating Inventory of Executive Function (BRIEF; Gioia et al., 2000, Child Neuropsychol., 6, 235; Gioia et al., 2000, Behavior rating inventory of executive function, Lutz, FL: Psychological Assessment Resources), a multifaceted rating scale of everyday executive functions. Phenotypic results revealed a 9‐scale, 3‐factor model best represents the BRIEF structure within the current sample. Results of the genetically sensitive analyses indicated the presence of rater bias/contrast effects for the Initiate, Working Memory, and Task‐Monitor scales. Additive genetic and non‐shared environmental influences were present for the Initiate, Plan/Organize, Organization of Materials, Shift, and Monitor and Self‐Monitor scales. Influences on Emotional Control were solely environmental. Interestingly, the aetiological architecture observed was similar to that of performance‐based measures of executive function. This observed similarity provided additional evidence for the usefulness of the BRIEF as a measure of ‘everyday’ executive function.