Accession Number : ADA056985


Title :   Design, Analysis, and Interpretation of Screening Studies for Human Factors Engineering Research. Revision.


Descriptive Note : Technical rept. Sep 1976-Sep 1977


Corporate Author : CANYON RESEARCH GROUP INC WESTLAKE VILLAGE CA


Personal Author(s) : Simon, Charles W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a056985.pdf


Report Date : Jun 1978


Pagination or Media Count : 239


Abstract : Methods are described for constructing Resolution IV screening designs that are robust to linear, quadratic, and cubic trend effects and will also keep the number of factor-level changes for some variables at a minimum. Complete designs, capable of screening up to 32 variables, are provided along with appropriate methods of analysis. Numerous criteria for selecting non- trivial variables are discussed, including: mean difference, eta squared, cumulative probability, and half-normal plots. How to handle subjects in an experiment is described when their characteristics can be included as experimental factors and when they cannot be, and when subjects are merely a form of replication. Lack-of-fit tests are provided to help decide whether a second- or a third-order response surface is needed. Numerous methods of analyzing screening studies with multiple responses are described. A method is given for developing a prediction equation with data collected from an incomplete screening design.


Descriptors :   *FACTOR ANALYSIS , *EXPERIMENTAL DESIGN , *HUMAN FACTORS ENGINEERING , CONFIDENCE LIMITS , DATA REDUCTION , SCALING FACTOR , STATISTICAL ANALYSIS , SELECTION , ANALYSIS OF VARIANCE , STATISTICAL TESTS , ALGORITHMS , WEIGHTING FUNCTIONS


Subject Categories : Human Factors Engineering & Man Machine System


Distribution Statement : APPROVED FOR PUBLIC RELEASE