Behavioral science researchers routinely use scale scores that sum or average a set of questionnaire items to address their substantive questions. A researcher applying multiple imputation to incomplete questionnaire data can either impute the incomplete items prior to computing scale scores or impute the scale scores directly from other scale…

To date, the majority of research on Attention-Deficit/Hyperactivity Disorder (ADHD) has been completed with boys as the predominate participants in study samples. Over the past decade there has been increased attention focused on the characteristics and needs of girls with ADHD. Although much of the research comparing boys and girls with ADHD…