On G.E. Moore’S ‘Proof of an External World’

A new reading of G.E. Moore's ‘Proof of an External World’ is offered, on which the Proof is understood as a unique and essential part of an anti‐sceptical strategy that Moore worked out early in his career and developed in various forms, from 1909 until his death in 1958. I begin by ignoring the Proof and by developing a reading of Moore's broader response to scepticism. The bulk of the article is then devoted to understanding what role the Proof plays in Moore's strategy, and how that role is played.     

Impact of situational legitimacy and assertiveness-related anxiety/discomfort on motivation and ability to generate effective criticism responses

This study compares the motivation and the quality of criticism responses of 697 undergraduates who were divided into three levels of situation legitimacy (high, moderate, and low) and two levels (top versus bottom 40 percent) of anxiety related to previous generalized assertiveness behaviours. The impact of gender was also studied. The results showed the legitimacy of the situation for a critical response (preassessed with peer hold-out groups) significantly affected participants' motivation to criticize as well as the quality of their critical responses, notwithstanding the poor quality of all criticism responses. Anxiety related to previous global assertiveness was related to high motivation but not to quality of criticism responses. There were no gender effects. Results are interpreted within an avoidance learning paradigm wherein the connotative meaning of criticism is incongruent with harmonious long-term relationships so that it is suppressed until virtually forced by the specifics of highly legitimate situations.     

A Quantitative Trait Locus Associated With Cognitive Ability in Children

Quantitative trait loci (QTLs) associated with general cognitive ability ( g ) were investigated for several groups of children selected for very high or for average cognitive functioning. A DNA marker in the gene for insulin-like growth factor-2 receptor (IGF2R) on Chromosome 6 yielded a significantly greater frequency of a particular form of the gene (allele) in a high- g group (.303; average IQ = 136, N = 51) than in a control group (.156; average IQ = 103, N = 51). This association was replicated in an extremely-high- g group (all estimated IQs > 160, N = 52) as compared with an independent control group (average IQ = 101, N = 50), with allelic frequencies of .340 and .169, respectively. Moreover, a high-mathematics-ability group ( N = 62) and a high-verbal-ability group ( N = 51) yielded results that were in the same direction but only marginally significant ( p = .06 and .08, respectively).     

The Influence of Gender and Parental Attitudes on Preschool Children's Interest in Babies: Observations in Natural Settings

This paper reports on two studies of parents'observations of their preschool children's interactions with infants. In Study 1 parents observed 69 3- and 5-year-old white children with three nonsibling infants whom the children encountered during their daily lives. In Study 2 parents observed 46 3- to 6-year-old primarily white children with three nonsibling infants and completed measures of their own gender-related child-rearing attitudes.Consistent with findings from previous laboratory research, this research in naturalistic settings found girls to show more interest in, more nurturance toward,and more interaction with babies than did boys. In Study 2, children whose parents had traditional gender-stereotyped attitudes were more likely to show this gender difference than children whose parents had more egalitarian child-rearing attitudes.     

Effects of form rotation on the speed of classification: the development of shape constancy

Ss classified a test form as matching or not matching one of a set of memorized forms relative to which the test forms were rotated up to 90 deg. “Match” reaction times increased monotonically with both number of forms memorized and degrees of rotation. Disappearance of the rotation effect after practice was attributed to a change from considering rotational information during comparison to comparing rotation invariant features. The change in strategy is considered an indicant of the development of shape constancy. Time taken to memorize the patterns increased linearly with the size of the memory set, justifying interpretation of the RT effects in terms of comparison time differences rather than differences in memorial specification of the patterns.