ERIC Number: EJ594313
Record Type: Journal
Publication Date: 1998
Reference Count: N/A
Detection of Answer Copying with Unknown Item and Trait Parameters.
Wollack, James A.; Cohen, Allan S.
Applied Psychological Measurement, v22 n2 p144-52 Jun 1998
Investigated empirical Type I error rates and the power of omega (index of answer copying developed by J. Wollack, 1997) when item and trait (theta) parameters were unknown and estimated from datasets of 100 and 500 examinees. Type I error was unaffected by estimating item parameters, with power slightly lower for the smaller sample. (SLD)
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A