|Title||Detection of aberrant item score patterns in computerized adaptive testing: An empirical example using the CUSUM|
|Publication Type||Journal Article|
|Year of Publication||2010|
|Authors||Egberink, IJL, Meijer, RR, Veldkamp, BP, Schakel, L, Smid, NG|
|Journal||Personality and Individual Differences|
|Keywords||CAT, computerized adaptive testing, CUSUM approach, person Fit|
The scalability of individual trait scores on a computerized adaptive test (CAT) was assessed through investigating the consistency of individual item score patterns. A sample of N = 428 persons completed a personality CAT as part of a career development procedure. To detect inconsistent item score patterns, we used a cumulative sum (CUSUM) procedure. Combined information from the CUSUM, other personality measures, and interviews showed that similar estimated trait values may have a different interpretation.Implications for computer-based assessment are discussed.