NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ774676
Record Type: Journal
Publication Date: 2007
Pages: 20
Abstractor: Author
Reference Count: 14
ISSN: ISSN-0013-1644
Methods of Identifying Individual Guessers from Item Response Data
Yang, Xiangdong
Educational and Psychological Measurement, v67 n5 p745-764 2007
This article investigates several methods of identifying individual guessers from their response data. Both the posterior probability method and the likelihood ratio method are based on the two-state mixture modeling approach to response times. The accuracy method is based on response accuracy data. Results from the simulation study showed that under similar classification criterion, the likelihood ratio method had a higher rate of correctly identifying guessers than the posterior probability method and led to a much higher rate of false-positive misclassification. The accuracy method, complementary to the likelihood ratio method, did reduce the false-positive rate of misclassification while maintaining the higher rate of correct identification of random guessers, given that examinees' response times are inversely related to their abilities. (Contains 3 tables and 3 figures.)
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A