My research has focused on structured personality assessment. In particular, I am interested in the accuracy of information obtained by the ever popular self report personality questionnaire. My past work has examined the process of responding to personality test items and how influences such as social desirability and person reliability can impact the validity of questionnaire responses. More recently, I have been examining the assumption that responses to behavioural items (such as "I smoke more than 10 cigarettes per day" or "I exercise three times week") are relatively more accurate than responses to the more traditional personality types ("I am conscientious").