A Japanese short form of the Swanson Cognitive Processing Test to measure working memory: reliability, validity, and differences in scores between primary school children of the United States and Japan

The purpose of this study was to examine the reliability and validity of a Japanese short form of the Swanson Cognitive Processing Test, which assesses capacity of working memory. Test-retest reliability was acceptable (r = .76). Concurrent validity was suggested through comparison of scores on the Reading Span Task (r = .55). Means on the Japanese short form were comparable with means for the 3 subtests for the older group and 2 subtests for the younger group. With the exception of the Auditory Digit Sequence, results suggested that both the Japanese short form and the initial Swanson Cognitive Processing Test measured comparably the working memory in the two samples of children.     

The Eysenck Personality Questionnaire Brief Version: factor structure and reliability

The short scale of the Eysenck Personality Questionnaire-Revised (EPQR-S; H. J. Eysenck & S. B. G. Eysenck, 1992) is a 48-item personality questionnaire primarily designed to measure an individual's level of extraversion (vs. introversion) and neuroticism. Although L. J. Francis, L. B. Brown, and R. Philipchalk (1992) created the Eysenck Personality Questionnaire Revised-Abbreviated (EPQR-A), an even briefer version of the EPQR-S, the reliability coefficients of some of the measures have been less than satisfactory (S. Forrest, C. A. Lewis, & M. Shevlin, 2000). Because brevity and reliability are both extremely important, the author of the present study created a briefer version of the EPQR-S, more reliable than the EPQR-A, by making slight alterations in the item content as well as the response format of the EPQR-S. Two hundred and sixty eight participants completed the original EPQR-S and the 24-item newly revised briefer version of the EPQR-S (EPQ-BV) twice. The findings revealed that the EPQ-BV has good internal consistency, test-retest reliability, and concurrent validity. A principal component analysis revealed a solution with factor loadings that accurately reflected the primary measures of the EPQR-S. These findings are discussed in relation to the psychometric properties of the EPQR-A and the original version of the EPQR-S.     

Relationship of worry and emotionality to test performance in a juku environment

The relationships between trait and state worry and emotionality and performance in a Juku environment were explored; these Japanese anxiety data were also compared in an international context. The Juku or ‘cram school’ provides additional after-school instruction to improve the probability of students getting into select private junior high schools. The subjects were 362 students in the fourth, fifth and sixth grades. Test anxiety was measured by the Japanese Children's Trait Worry and Emotionality Scale and the Japanese Children's State Worry and Emotionality Scale. The performance tests measured achievement in mathematics, social studies, Japanese language, and science. As expected, the relationship between the state worry measures and performance was stronger than between either state emotionality or the trait measures. The data also indicate that trait anxiety was dramatically less here than in other international contexts while state anxiety was moderately less.     

Do birds (pigeons and bantams) know how confident they are of their perceptual decisions?

Rhesus monkeys are known to recognize confidence about their immediate perceptual and cognitive decisions by using a betting procedure (Son and Kornell in The missing link in cognition: origins of self-reflective consciousness. Oxford University Press, New York, pp 296–320, 2005; Kornell et al. in Psychol Sci 18:64–71, 2007). In this report, we examined whether this ability is shared in two avian species (pigeons and bantams) in order to know how widespread this metacognitive ability is among animals. We trained pigeons and bantams to search for a differently colored disk (target) among others (distracters) displayed on a touch-sensitive monitor. In test, the subjects were required to choose one of two confidence icons, “risk” and “safe”, after the visual search. A peck at the “risk” icon after a correct response in the visual search (i.e., a peck at the target) was reinforced by food and light, while that after an incorrect response (i.e., a peck at a distracter) resulted in a timeout. A peck at the “safe” icon was always reinforced by food and light, or by light only, regardless of the visual search result. The percentages of “safe” choices after incorrect responses were higher than after correct responses in all six pigeons and two of three bantams. This behavior generalized to novel stimuli in some subjects, and even to a novel line-classification task in a pigeon. These results suggest that these two distantly related avian species have in common a metacognitive ability that allows them to recognize confidence about their immediate perceptual decisions.     

A Multimethod Multitrait Validity Assessment of Self‐Construal in Japan,Korea, and the United States

A large number of previous studies have used self‐construal to predict communication outcomes. Recent evidence, however, suggests that validity problems may exist in self‐construal measurement. The current study conducted a multimethod multitrait (Campbell & Fiske, 1959) validation study of self‐construal measures with data (total N= 578) collected in Korea (N= 200), Japan (N= 212), and the U.S. (N= 166). The data showed that the Singelis (1994) Self‐Construal Scale, the Cross, Bacon, and Morris (2000) Relational Interdependent Self‐Construal Scale (RISC), and the Kuhn and McPartland (1954) Twenty Statements Test (TST) lacked convergent and discriminant validity, both pan‐culturally and within each of the three countries included in the study. Scores on the TST were not significantly related to scores on the self‐construal scales, and the various self‐construal measures correlated more highly with measures of communication directness than with alternative measures of the same type of self‐construal. Substantial method effects were also observed. The results were tested for both 2‐ and 3‐dimensional models of self‐construal and for refined scales and scales with all items retained. The results of all analyses were inconsistent with the claim that self‐construal measures are construct valid.