Acceptance of lack of closure: is it an index of advanced reasoning?

Lunzer reported data suggestive of a stage of cognitive development manifest between 9 and 11 years of age characterized by the ability to avoid drawing premature inferences when faced with ambiguity (i.e., accept lack of closure [ALC]). The present study sought to test this hypothesis. Inference tasks emphasizing ALC, memory, and hypothetico-deductive reasoning were administered to 67 males and 74 females (5-12 years in age). Although use of ALC increased with age, considerable use was evidenced on a simple task among 7-8-year-olds. On tasks hypothesized to place increasing demands on working memory, longer tasks were found to be more difficult. Marked improvement due to memory aids suggested that task difficulty results from limitations in working memory as predicted by Pascual-Leone's theory. Tasks requiring hypothetico-deductive reasoning were found to be most difficult. Performance was related to subject's spontaneous use of ALC. Lack of appropriate strategies was hypothesized to prevent solution rather than lack of logical competence. In conclusion, the relationship of ALC to age appears to be mediated by memory development rather than logical development.     

The BioSS Challenge - A demonstration of sampling bias

A sampling problem is described which was given to the general public to illustrate the problems of bias and the need for randomisation when sampling.     

School-based model for preventing teenage pregnancy

Social workers in the schools can take positive and immediate action to address teenage pregnancy through the use of interventive models that help teenagers avoid the risk of unwanted pregnancy. The present article describes and empirically supports 1 such school-based model. The author 1st delineates the major problems associated with teenage pregnancy and then relates the preventive model to prior research and details its implementation in school settings. A discussion of reslults from the model's field evaluation is followed with implications for school social workers. The model reported here is directed to all adolescents rather than focusing on a "high-risk" population. The risk of pregnancy is assumed to be a normal part of adolescent development. Grounded in an intterpersonal conceptualization of teenage pregnancy and in related empirical research, the school-based model helps young men and women acquire the requisite skills for preventing unwanted pregnancy. The program requires school social workers to meet with 12-18 teenage students of both sexes and to provide them with basic information on human sexuality, reproduction and contraception. These topics are covered by lectures, demostrations, discussion and audiovisual presentations. Through instruction, feedback and reinforcement, student learn how to talk about sensitive topics, stand up for their rights and be convincing and effective when carrying out decisions. Homework assignments are designed to develop the students'skills in interactions with dating partners, parents and friends. The clinical applicability and effectiveness of this prevention training model is documented through a study conducted in an urban high school. 36 informed and consenting sophomores of both sexes were randomly assigned either to an interventive group or to a non-treatment control group. Compared to the latter, the former had more accurate knowledge of human reproduction and contraception after the intervention. Buttressing these and other positive results, the students' enthusiastic feedback left little doubt that they enjoyed the group process and were interested in the training. Moreover, analyses of follow-up data on coital activity, the use of contraceptives, and family planning decisions revealed that the training had produced striking effects. Decision making tests, behavioral performance tests, follow-up questionnaires and videotaping of behavior during stressful interpersonal situations were among the evaluation techniques used.     

Ocular dominance,reading and spelling: a reassessment of a measure associated with specific reading difficulties

The association of reading disability with perceptuomotor problems has had a chequered history. This study examines the relationship between a new test of ocular dominance and reading and spelling ability in a group of 323 schoolchildren. Similar rates for unfixed ocular dominance were found for poor readers as in comparable studies. The rates of unstable ocular dominance did not differ between those with reading and spelling difficulties and controls. These findings in a ‘blind’ study question the role of this test of eye dominance as a diagnosis of ‘dyslexia’.     

Personality structure,instructional outcomes,and instructional preferences

Four instructional treatments differing in structure and student responsibility were used with 60 abstractthinking and 60 concrete-thinking students. As predicted, abstract students preferred those treatments with less structure and more responsibility; however, abstract and concrete students showed similar achievement levels as a result, of each treatment. The differentiated outcomes hypothesis is offered to account for the findings.

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Résumé Quatre méthodes de traitement pédagogique de structure et de responsabilité des étudiants ont été employées avec 60 étudiants pensant abstraitement et 60 étudiants pensant de manière concrète. Ainsi que prévu, les étudiants pensant abstraitement préféraient les méthodes ayant moins de structure et plus de responsabilité. Les deux catégories d'étudiants ont toutefois obtenu des niveaux d'accomplissement pareils avec chaque méthode de traitement. L'hypothèse des aboutissements différenciés est offerte comme explication des conclusions.

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This study was based in part on the doctoral dissertation of the junior author. The authors would like to thank the students and staff of the County College of Morris, Morristown, N.J., for their cooperation.     

Peer-Collaborator Preferences of African American and White Sixth-Graders in Mathematics Classrooms

Abstract

This study focused on academic and social correlates of collaborator preferences of African American and White sixth-graders in mathematics classrooms in fall and spring. Students’ appraisals of emotional risk were examined as a moderator. Nomination procedures identified collaborator preferences, group affiliations, and social centrality; students self-reported engagement and emotional risk; school records provided achievement scores. Results indicated students preferred group affiliates, but not exclusively, as collaborators. Students with greater centrality, achievement, and engagement received more nominations. In the fall, high achievers received more nominations when appraisals of risk were high; whereas, engaged students whose appraisals of risk were low received more nominations. Results are interpreted in relation to coordinating social and academic factors in peer collaboration.