Dr M. G. Gelder, who was Medical Research Council Fellow in Clinical Research at Birkbeck College, is now at the Institute of Psychiatry, University of London. The work was supported in part by research grant MH-03313 from the National Institute of Mental Health, Public Health Service, U.S.A.
EXPERIMENTAL ANALYSIS OF DRUG EFFECTS ON HUMAN PERFORMANCE USING INFORMATION THEORY CONCEPTS
Version of Record online: 13 APR 2011
1965 The British Psychological Society
British Journal of Psychology
Volume 56, Issue 2-3, pages 255–265, August 1965
How to Cite
BERRY, C., GELDER, M. G. and SUMMERFIELD, A. (1965), EXPERIMENTAL ANALYSIS OF DRUG EFFECTS ON HUMAN PERFORMANCE USING INFORMATION THEORY CONCEPTS. British Journal of Psychology, 56: 255–265. doi: 10.1111/j.2044-8295.1965.tb00963.x
- Issue online: 13 APR 2011
- Version of Record online: 13 APR 2011
- Manuscript received 15 April 1964
- Cited By
Effects of differences in mean stimulus information under two coding conditions and of sub-anaesthetic doses of nitrous oxide (15, 25 and 35% in oxygen) were investigated in two card-sorting experiments with student subjects In Expt. I, in which conventional playing cards were sorted into two, four or eight classes, the effect of the drug increased significantly with task complexity. Expt. II, in which cards bearing numerals were used, showed a drug effect which was independent of task complexity measured by mean information per stimulus. Neither result was to be explained in terms of a drug effect on the motor component of the tasks. Reasons for the difference between the two experiments are considered in relation to other evidence of effects of central nervous depressant drugs on input processes and short-term memory. The value of communication models for research on effects of drugs on human skills is discussed.