
Accession Number : ADA181328
Title : Steps Toward an Empirical Evaluation of Robust Regression Applied to ReactionTime Data.
Descriptive Note : Technical rept. no. 2, 5 Sep 8531 Aug 87,
Corporate Author : PENNSYLVANIA UNIV PHILADELPHIA
Personal Author(s) : Sternberg,Saul ; Knoll,Ronald L ; Turock,David L
PDF Url : ADA181328
Report Date : Nov 1986
Pagination or Media Count : 25
Abstract : Current statistical theory provides little useful guidance about how to reduce the sensitivity of analyses of reaction time data to aberrant observations and violations of statistical assumptions, either because robust methods, which are very inviting, are insufficiently understood, or because aspects of the data are not characterized fully enough to permit devising theoretically justifiable analyses. In this report we suggest an empirical approach, in which one applies the same criteria to the problem of selecting a statistical method as those that one uses to select among alternative experimental procedures. We define six such criteria, and then describe five tests based on a set of about 36,000 observations in which we compare ordinary leastsquares multiple regression as a way of characterizing the data with Hubers robust iteratively reweighted leastsquares method. Results favor the robust method. Results favor the robust method. Keywords: Psychology, Perception, Visual, Statistics, Mathematics, Reaction time, Memory.
Descriptors : *REACTION TIME, *STATISTICAL PROCESSES, ABNORMALITIES, TEST AND EVALUATION, STATISTICAL TESTS, PERCEPTION(PSYCHOLOGY), REGRESSION ANALYSIS, LEAST SQUARES METHOD, MATHEMATICAL MODELS, ITERATIONS
Subject Categories : Psychology
Statistics and Probability
Distribution Statement : APPROVED FOR PUBLIC RELEASE