Learning with microcomputers: Training primary school children on a problem-solving program

This study investigated the effects of structured training at two informational levels on children's performance on a problem-solving computer program. An informed-training group (strategy training with detailed explanations) performed at a superior level to a blind-training group (strategy training with no explanations) and a control group. This superiority was maintained 3 weeks later on retest. The results are discussed in relation to the processes that mediate and facilitate training.     

Ready to make nice: parental socialization of young sons' and daughters' prosocial behaviors with peers

In this study, the authors examined the extent to which maternal and paternal parenting styles, cognitions, and behaviors were associated with young girls' and boys' more compassionate (prototypically feminine) and more agentic (prototypically masculine) prosocial behaviors with peers. Parents of 133 preschool-aged children reported on their authoritative parenting style, attributions for children's prosocial behavior, and responses to children's prosocial behavior. Approximately 6 months later, children's more feminine and more masculine prosocial behaviors were observed during interactions with unfamiliar peers and reported on by their preschool teachers. Boys and girls did not differ in the observed and teacher-reported measures of prosocial behavior. Compared to other parents, fathers of boys were less likely to express affection or respond directly to children's prosocial behavior. Mothers' authoritative style, internal attributions for prosocial behavior, and positive responses to prosocial behavior predicted girls' displays of more feminine prosocial actions and boys' displays of more masculine prosocial actions toward peers. Relations were similar but weaker for fathers' parenting, and after accounting for mother' scores, fathers' scores accounted for unique variance in only one analysis: Teachers reported more masculine prosocial behavior in boys of fathers who discussed prosocial behavior. Overall, the results support a model of parental socialization of sex-typed prosocial behavior and indicate that mothers contribute more strongly than do fathers to both daughters' and sons' prosocial development.     

Working memory updating and the development of rule-guided behavior

The transition from middle childhood into adolescence is marked by both increasing independence and also extensive change in the daily requirements of familial demands, social pressures, and academic achievement. To manage this increased complexity, children must develop the ability to use abstract rules that guide the choice of behavior across a range of circumstances. Here, we tested children through adults in a task that requires increasing levels of rule abstraction, while separately manipulating competition among alternatives in working memory. We found that age-related differences in rule-guided behavior can be explained in terms of improvement in rule abstraction, which we suggest involves a working memory updating mechanism. Furthermore, family socioeconomic status (SES) predicted change in rule-guided behavior, such that higher SES predicted better performance with development. We discuss these results within a working memory gating framework for abstract rule-guided behavior.     

Multilevel Multivariate Meta-analysis with Application to Choice Overload

We introduce multilevel multivariate meta-analysis methodology designed to account for the complexity of contemporary psychological research data. Our methodology directly models the observations from a set of studies in a manner that accounts for the variation and covariation induced by the facts that observations differ in their dependent measures and moderators and are nested within, for example, papers, studies, groups of subjects, and study conditions. Our methodology is motivated by data from papers and studies of the choice overload hypothesis. It more fully accounts for the complexity of choice overload data relative to two prior meta-analyses and thus provides richer insight. In particular, it shows that choice overload varies substantially as a function of the six dependent measures and four moderators examined in the domain and that there are potentially interesting and theoretically important interactions among them. It also shows that the various dependent measures have differing levels of variation and that levels up to and including the highest (i.e., the fifth, or paper, level) are necessary to capture the variation and covariation induced by the nesting structure. Our results have substantial implications for future studies of choice overload.     

Game theory and belief in God

In the last few decades game theory has emerged as a powerful tool for examining a broad range of philosophical issues. It is unsurprising, then, that game theory has been taken up as a tool to examine issues in the philosophy of religion. Economist Steven Brams (1982), (1983) and (2007), for example, has given a game theoretic analysis of belief in God, his main argument first published in this journal and then again in both editions of his book, Superior Beings. I have two main aims in this paper, one specific and one general. My specific aim is to show that Brams’ application of game theory to examine belief in God is, in particular, deeply flawed in two respects. My general aim is to show that any game-theoretic model in which a human being and God are players can only succeed at the cost of abandoning the assumption that God is omnibenevolent.     

How young children pour equal quantities: A case of pseudocompensation

Two experiments are reported on how 3- to 4.5-year-old children pour equal liquid quantities. An apparent precocity and a decline with age in the ability to judge correctly when different-sized glasses contain the same amount of liquid is demonstrated in Experiment 1. Children of different ages use different strategies to make judgments of equality and this is revealed in Experiment 2. The most primitive strategy fortuitously led the youngest children to make a correct response in Experiment 1 but led to incorrect responses in Experiment 2. Possible explanations of these results are discussed.     

Interval production as an analogue of the peak procedure: Evidence for similarity of human and animal timing processes

Humans subjects repeatedly produced durations ranging from 0.5 to 1.3 sec, with each trial being followed by accurate feedback as to the time produced. An analogy was drawn between this production task and the peak procedure, a technique used to examine temporal control in rats which typically produces data conforming to scalar timing theory. Human production data were analysed in a way similar to that employed in peak procedure experiments. Using non-linear regression, it was found that the peak of relative frequency distributions of times produced varied accurately with the target time, and that the coefficient of variation of fitted curves was approximately constant as peak location and target time varied. In both these respects human production data were very similar to those collected from rats in peak procedure experiments, and thus compatible with scalar timing and Weber's law. Weber fractions obtained in this experiment were about half the value of those produced by rats in peak procedure studies, but only slightly lower than those obtained from animals in some other experimental situations.     

Dementia with Lewy bodies: a pure case

A pure case of autopsy-confirmed dementia with Lewy bodies (DLB) is described. The patient presented with distinctive verbal fluency deficits in the context of mild language impairment, intact recognition memory, and impaired paragraph recall. Neuroimaging (CT and SPECT) showed progressive medial temporal lobe atrophy. Neuropathology revealed Lewy bodies, degeneration in the substantia nigra, nucleus basalis of Meynert (Nakano & Hirano, 1984), and locus ceruleus, but no pathology characteristic of Alzheimer's disease. It is in this sense that the case is "pure" DLB. Early neuropsychological diagnosis of DLB is essential (Salmon et al., 1996) given the potentially fatal hazard of neuroleptics (McKeith et al., 1992) and the difficulties associated with clinical neurological diagnoses (Litvan et al., 1998).