Education Commons^™

Using Rasch Residuals To Analyze The Demographic Characteristics Of Respondents With Unexpected Incorrect Answers: Implications For Construct Validity, Robert K. Gable, Larry Ludlow, Ph.D., Stacey L. Kite

Research Methodology

This paper illustrates the use of Rasch model residuals to better understand perceived respondent meaning and structure of item content in the context of construct validity. Data were gathered from1366 grade 7-8 students using the Survey of Knowledge of Internet Risk and Internet Behavior. The characteristics of the respondents with unexpected patterns of residuals for persons not fitting the Rasch model are examined for 7 items defining the Knowledge of Internet Risk scale. These analyses contribute to a better understanding of the item content and person scores, and contribute to more meaningful score inferences.