Abrupt luminance change pops out; abrupt color change does not

The present studies investigated whether an isoluminant color change pops out, indicating that it can be detected preattentively in parallel. The results of Experiment 1 show that an abrupt color change presented on an equiluminant background does not pop out. However, when the color change is accompanied by a small luminance change, it does pop out. The results of Experiment 2 show that the pop-out is fully due to the luminance change and not to the color change. The results of Experiments 3 and 4 show that the failure to find a pop-out at equiluminance cannot be attributed to the limited temporal resolution for chromatic stimuli. The results of Experiment 5 show that particular search strategies cannot be responsible for the obtained results. The results are in agreement with physiological findings regarding the parvo and magno systems.     

Legal and ethical issues in conducting research on alcohol and drug use with children: a reaction to Havey and Dodd

Although research pertaining to alcohol and drug use by children clearly is very important for our field, it also presents a number of difficult ethical and legal challenges. In this article we react to Havey and Dodd's research (1995, this issue), commenting specifically on their use of a passive consent procedure. Problems with this aspect of their methodology are reviewed in relationship to best research practices, the U.S. Constitution, case law, federal statutes, and the ethical codes of the American Psychological Association, the National Association of School Psychologists, and the American Educational Research Association.     

MENTAL PROCESSES INVOLVED IN RAPID LOGICAL REASONING

S medslund , J. Mental processes involved in rapid logical reasoning. Scand. J. Psychol ., 1968, 9, 187–205.—Approximate reaction times of adult subjects were recorded in three studies of addition and subtraction of units, and in one of transitive inference. Transformations such as from 'V has more than H' to 'H has less than V' were found to be important determinants of RT in additionlsubtraction. Under some conditions subjects preferred to combine the first two elements in a triad of operations first, under other conditions they seemed to select inversions (V + 1 & V−1) first. Symmetries (V + 1 & H +1) were apparently never preferred. All transitive tasks seemed to be converted into normal form (A>B ∓ B>CorA < B & B < C) before they were solved.     

THE ACQUISITION OF CONSERVATION OF SUBSTANCE AND WEIGHT IN CHILDREN

S medslund , J. The acquisition of conservation of substance and weight in children. I. Introduction. Scand. J. Psychol ., 1961, 2 , 11–20.—This is the first in a series of articles concerning the problem of how children acquire the concepts of conservation of substance and weight. The four alternative interpretations of nativism, maturation theory, learning theory and equilibration theory are discussed. It is concluded that nativism and maturation theory do not account for the known facts. An important issue is whether the concepts are established by external reinforcement (learning theory) or by a process of inner equilibration, as maintained by Piaget.     

The relationship of young adolescent Children's Depression Inventory (CDI) scores to their social and cognitive functioning

The relationship of young adolescents' scores on the Children's Depression Inventory (CDI) to subjective and objective indices of their social and cognitive functioning was examined. Subjects were 89 young adolescents (11–15 years old), their parents, and their social studies teachers. The correlations of adolescents' CDI scores with recent school grades, objective ratings of overt social behavior, and measures of adolescent social and cognitive competence as perceived by the adolescent, both parents, and the teacher were examined. CDI scores were significantly and negatively correlated with school grades, behavioral ratings of positive social communication, and adolescent, mother, father, and teacher perceptions of the adolescents' social and cognitive competence. The relationship of these findings to those of other CDI validity studies is discussed.This research was supported, in part, by the William T. Grant Foundation and the University of Georgia's Institute for Behavioral Research.     

Aiming at the top? Upward social comparison of abilities after failure

This study examined the effects of feedback on a task on information seeking and partner preferences as forms of social comparison. It was predicted that subjects who experienced failure and perceived control over future performance would, for reasons of self-improvement, choose more strongly upward a comparison other than subjects who experienced success or perceived no control. In the experiment, 121 college students were given either failure, average, or success feedback on a bogus test for either a stable or a controllable ability. Next, the subjects choose a comparison other whose test material they would examine, and a comparison other as a partner for writing an evaluation of the test. As predicted, the preferences for information seeking and affiliation were more strongly upward when subjects experienced failure than when subjects experienced success. Perceived control partly resulted in more strongly upward choices in information seeking for subjects experiencing failure.     

Validation of a role-play measure of children's social skills

A videotape-administered role-play test of children's social skills was developed and its psychometric properties tested. Performance criteria for the test were derived from popular children's ratings of the effectiveness of different role-play responses. The test was administered to 157 fourth- and fifth-grade boys and girls who had been classified as popular, average, neglected, or rejected, on the basis of sociometric testing. The test evidenced good interrater, test-retest, and internal consistency reliabilities. Children's role-play performance correlated significantly with teacher ratings of social competence and with peer-liking ratings. Neglected children performed more poorly on the role-play test than popular children. When differences in intelligence among social status groups were statistically controlled, social status groups did not differ on the role-play test. Results of the discriminant analyses support the conclusion that teacher ratings are better than role-play tests for identifying rejected children, whereas role-play tests and measures of intelligence appear more accurate than teacher ratings for identifying neglected children.     

Computers and girls: Rethinking the issues

A perspective is developed about emerging sex differences in the use of computer technology in education. Computers tend to be conceptually assimilated to the category of science/mathematics/technology, and thus acquire some of the traditional qualities of differentiated interest among boys and girls. Findings from several research projects are reported which point to patterns of difference in educational settings. It is argued that sex differences emerge in relation to the functions computers serve and the organization of learning settings of which they are a part.The preparation of this article and the research reported was supported by the Spencer Foundation, the Department of Education, and the National Institute of Education. The author would like to thank Kathy Clement, Carla Freeman, Peggy Heide, Moni Homolsky, Midian Kurland, Ron Mawby, Roy Pea, and Karen Sheingold for their comments and suggestions about the perspective presented here.