Accession Number:

ADA285856

Title:

Treatment of Outliers in Cognitive and Psychomotor Test Data

Descriptive Note:

Interim rept. Jan-Oct 1992

Corporate Author:

GEORGIA UNIV ATHENS DEPT OF PSYCHOLOGY

Personal Author(s):

Report Date:

1993-03-01

Pagination or Media Count:

17.0

Abstract:

Many statistical tests and review articles have pointed out the possible adverse effects that outliers can have on model parameter estimates, and have suggested several methods for detecting and treating outliers. In the present study, the effects of two different methods for treating outliers in aptitude tests data deletion and data transformation were investigated at the item and total-score level on the internal consistency and criterion-related validity of six computerized tests being evaluated by the U.S. Air Force. Over 2,000 pilot training candidates were tested. Results indicated that neither outlier treatment method at either level of analysis had significant effects on tests psychometric characteristics. Possible reasons for these findings include the rarity with which outliers actually occur, and the robustness of linear modeling methods. Computer-based tests, Test reliability, Outliers analysis, Test validity

Subject Categories:

  • Psychology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE