Accession Number : ADA328532

Title :   An Additional Metric for Communicating Group Performance Differences

Descriptive Note : Final rept. Jan-Jun 95

Corporate Author : ARMY RESEARCH INST FOR THE BEHAVIORAL AND SOCIAL SCIENCES ALEXANDRIA VA

Personal Author(s) : Silva, Jay M.

PDF Url : ADA328532

Report Date : FEB 1997

Pagination or Media Count : 21

Abstract : The common practice of expressing group performance differences in standard deviation units conveys useful but limited information. Reporting the percentage of the time a member from a lower performing group is expected to outperform a member from a higher performing group would enhance understanding of the magnitude of the difference. Furthermore, the proposed percentage metric is able to easily deal with group variability differences in addition to mean group differences. An analytical approach was used to convert group performance differences from standard deviation units to the proposed metric. The slope of the relationship between the two metrics is nearly linear through a one standard deviation group performance difference. Tables are presented that can be used to convert group performance differences in standard deviation units to the new metric.

Descriptors :   *GROUP DYNAMICS, *PERFORMANCE(HUMAN), *PSYCHOMETRICS, DECISION MAKING, STATISTICAL INFERENCE, STATISTICAL DATA, ANALYSIS OF VARIANCE, STATISTICAL SAMPLES, MEAN, JUDGEMENT(PSYCHOLOGY), STANDARD DEVIATION.

Subject Categories : Psychology
      Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE