The effects of reward and punishment on reaction times and autonomic activity in hyperactive and normal children

The performance of hyperactive and control children was compared on a delayed reaction time task under three reinforcement conditions: reward, punishment, and reward plus punishment. Hyperactives had slower and more variable reaction times, suggesting an attentional deficit. Although each of the three reinforcement conditons was successful in improving reaction times for both subject groups, reward led to a significant increase in impulsive responses in the hyperactive children. Autonomic data revealed that reward also increased arousal to a greater extent than punishment or reward plus punishment. Although resting skin conductance was not different in the two groups of subjects, hyperactives produced fewer specific autonomic responses to signal stimuli.     

Factors affecting the magnitude of the Ponzo perspective illusion among the Baganda

The magnitude of the Ponzo perspective illusion, utilizing stimuli with varying amounts of context, was determined for a population of Ugandan villagers. The subjects were classified as two-dimensional, three-dimensional, or mixed perceivers based upon their verbal responses to photographs portraying symbolic depth cues. The illusion magnitude among those subjects classified as three-dimensional was similar to that of college observers who demonstrate an increase in illusion magnitude with increasing background context. The two-dimensional observers’ responses were similar to those of villagers tested previously, showing no significant increase for the same conditions. The role of two-dimensional flatness cues was eliminated on the basis of a control experiment. The data are interpreted as reflecting the operation of a. cognitive factor determining responsiveness to symbolic depth cues in two-dimensional reproductions.     

Book review

EVANS, R. M. The Perception of Color. New York: Wiley and Sons. 1974. Pp. xii + 248. £ 8.10.

ROSS, H. E. Behaviour and Perception in Strnge Enviroment. London: George Allen and Unwin. 1974. Pp. 171. £ 3.95. (Hardback), £ 1.95. (Peperback).

COOPER, J. R. BLOOM, F. E. and ROTH, R. H. The Biochemical Basis of Neuropharmacology. 2nd Ed. New York and London: Oxford University Press. 1974. Pp. 272. £ 2.50.

JOHNSON, F. N. (Ed.) Lithium Research and Teerapy. London: Acakemic Press. 1974. Pp. 570. £ 13.50.

GERGG, L. W. (Ed.) Cognition in Lerning and Memory. New York: Wiley. 1972. Pp. vii + 263. £ 5.85.

SCHIEFELBUSCH, R. L. and LLOYD, L. L. Language Perspectives-Acquisition, Retardation and Intervention. Macmillan: Baltimore, 1974. Pp 670. £ 7.95.

CHOMSKY, C. The Acquisition of Syntax of Syntax in Children form 5 to 10. Cambridge, Massa-chusetts: M. I. T. Press. 1969. Pp. 126.

Annual Review of Psychology. Vol. 25. Palo Alto, California: Annual Reviews Inc. 544 PP. $ 12.50.

HARRISON, B. Meaning and Structure: An Essay in the Philosophy of Language. New York: Harper and Row. 1972. Pp. 318. £4.65.

MACKINTOSH, N. J. The Psychology of Animal Learning. Academic Press. 1974. Pp. 730. £ 8.00.

BURES, J., BURESOVA, O. and KRIVANEK, J. The Mechanism and Application of Leao's Spreading Depression of Electroephalagraphic Activity. New York: Academic Press. 1974. Pp. 410. £ 14.15.

SOLSO, R.L. (ED.). Theories in Cognitive Psychology: The LOyola Symposium. Potomac, Maryland: Lawrence Erlbaum associates. 1974. £ 7.95.

MURDOCK, B. B. Jr. Human Memory: Theory and Data. Potomac: Erlbaum (distributed by Wiley). 1974. Pp. 362. £ 6.85.

REED, S. K. Psychological Process in Pattern Recogntion. New York: Academic Press. 1973. $ 13.95.

RABBIT, P. M. A. and DORNIC, D. (Eds). Attention and Performance V. London: Academic Press. 1975. Pp. 732. £ 16.00.     

Visual masking,mental age,and retardation

Performance of retarded subjects under both forward and backward masking was less accurate than either an equivalent chronological age or equivalent mental age group of normals. It was suggested that the iconic memory impairment of retarded subjects in attributable in part to mental retardation and not simply to low mental age.     

Semi-automated desensitization : a controlled clinical trial

A clinical trial of semi-automated desensitization on phobic patients. Twelve received treatment with a therapist present and 12 received treatment from pre-recorded tapes. Therapy lasted a maximum of 16 weekly sessions. Assessment of progress was by means of self-ratings of phobic behaviour and more global fear ratings, made by the referring psychiatrist. Both treatments produced beneficial results. Both ratings agreed in finding no significant differences between the two methods of administration, thus confirming results from existing non-clinical trials of automated desensitization. Regardless of treatment group, agoraphobics and social phobics tended to improve less markedly, and less rapidly than simple phobics. Some implications of automated therapy for clinical practice are discussed.