Logics preserving degrees of truth

The paper introduces a concept of logic applied to a formalization of the so-called inferences preserving degrees of truth. Semantical and syntactical characterizations of three kinds of logics preserving degrees of truth are provided. The other approach than in [3] and [9] to the problem of expressing that a sentence is less true than a sentence is presented.     

DEVELOPMENTAL COGNITIVE AND BEHAVIORAL ACHIEVEMENT OF CHILDREN FROM THREE SOCIOCULTURAL GROUPS*

The present study investigated, under three experimental conditions, the induction of communication messages of 219 7-and 9-year-old children of Anglocelt, Aboriginal, and mainland European heritage in Australia. Children's self-concept and their teachers' ratings of their classroom behavior were also examined. Hierarchical multivariate and univariate analyses of variance were applied to task-specific data sets. On the communication task, significant differences were obtained on Condition (C), Sociocultural Group (SG), Age (A), and SG × Sex. On the self-concept variables, significant differences were obtained on A only. Significant differences on A, SG, and Sex were obtained for the teachers' ratings of children's classroom behavior. Correlations between the communication tasks and behaviour ratings increased systematically as the complexity of the communication tasks increased to the asymptotic levels. The self-concept measures were uncorrelated to both the communication tasks and teachers' ratings. Results suggest the possibility of effective cognitive mediation and the consistency with which teachers value overt communication.     

Confrontation in the group analytic matrix: Toward a classification

This paper illustrates how confrontation is used in applying the Group Analytic model of Foulkes. Within the group, confrontation with images of the self and others provides a many-layered experience which transcends the classical psychoanalytic differentiation between confrontation, clarification and interpretation. A classification of seven types of confrontation is offered based on who confronts whom, and is linked with Foulkes's four levels of relationship within a group.Based on a paper read at the 9th Congress of the International Association of Group Psychotherapy, Zagreb, Yugoslavia, August 1986.     

The relative accessibility of phonemes and syllables

Previous research comparing detection times for syllables and for phonemes has consistently found that syllables are responded to faster than phonemes. This finding poses theoretical problems for strictly hierarchical models of speech recognition, in which smaller units should be able to be identified faster than larger units. However, inspection of the characteristics of previous experiments’ stimuli reveals that subjects have been able to respond to syllables on the basis of only a partial analysis of the stimulus. In the present experiment, five groups of subjects listened to identical stimulus material. Phoneme and syllable monitoring under standard conditions was compared with monitoring under conditions in which near matches of target and stimulus occurred on no-response trials. In the latter case, when subjects were forced to analyze each stimulus fully, phonemes were detected faster than syllables.     

PROBLEM SOLVING,PLANNING AND PERSONALITY*

The present study was designed to investigate student behaviour in a river-crossing problem in light of prior experience, intelligence, personality, mode of presentation and age. Ninety-six students at Year 6 and 61 students at Year 8 from schools in Australia were administered the Eysenck Junior EPQ and IVE scales, together with six cognitive tasks used to index the Luria successive and simultaneous processing and planning functional units. Each student was given a river-crossing problem presented in one of two modes and at one of two levels of difficulty. Success on the river-crossing problem was found to be independent of age, mode of presentation or prior experience on the task. There was a significant effect due to problem awareness, intelligence and empathy and a mode by success interaction. An attempt was made to group students into problem-solver ‘types’. The results were discussed in terms of the link between cognitive and affective variables and intervention programmes.     

Child care and influence among the mekranoti of central brazil

Various researchers have argued that women's influence may be limited by child-care requirements. This study uses quantified data from the Mekranoti-Kayapó of Central Brazil to examine some specific arguments. Among the Mekranoti, women who spend more time caring for children rate lower on influence. But the reasons for this correlation are less clear. Child care does not seem to hinder a woman's ability to contribute to subsistence. Nor does it seem to have much effect on the personality characteristics that might affect the leadership potential of child caretakers. Child care may, however, restrict a woman's ability to acquire the personal connections needed to exercise influence.This article is based on a chapter from the author's doctoral dissertation. The author thanks Daniel R. Gross, Carol R. Ember, Madeline Ritter, Nancy Flowers, Daniel G. Bates, and Robert A. LeVine for their many helpful suggestions in preparing the study. The author also thanks various people for help in carrying out the fieldwork on which they study is based: S. Gross, G. Verswijver, R. Thomson, K. Jefferson, M. Stout, F. Leoi, and R. Cardoso de Oliveria, G. Diaz, K. Taylor, A. Ramos, G. Zarur, R. De Barros Laraia, L. Vidal, D. Montagner Melatti, J. C. Melatti, and J. Bispo dos Santos. The study was generously supported by NSF grants BNS 76-03378, BNS 73-25295, and BNS 78-24706.     

Rats' lever-press durations as psychophysical judgments of time

Hungry rats received food following lever-press durations exceeding a minimum value, which ranged from 0 to 6.4 sec. When no intertrial intervals separated successive presses, modal press durations remained at very short values as the minimum value required for food was increased. This was particularly true immediately after a food presentation. When an 8-sec intertrial interval followed each lever release, modal press durations were always at or beyond the minimum value required for food, and outcome of the preceding press had no effect on press duration. Possible reasons for the effects of intertrial intervals included punishment of short presses, increased delay of reinforcement of short presses, and reduced density of reinforcement. In addition, functions relating discrete-trials lever-press duration to minimum duration required for food were found to be qualitatively and quantitatively similar to the power functions recently proposed by Catania (1970) for interresponse time and response latency. This similarity was taken as support for a general psychophysical law of temporal judgments.