Her research interests involve applications of the psychometric methods of item response theory (IRT) to issues that arise in personality and social psychological measurement. She investigates processes underlying responses to self-report questions, context effects in personality measurement, and the effects of alternate response scales on item responses for social and personality measures. She has been active in the development and validation of new instruments for personality, social, and clinical research. She is also one of the authors of Computerized adaptive testing: a primer (Lawrence Erlbaum), published in 1990 and republished in a second edition in 2000.