The Mattis Dementia Rating Scale (MDRS) is a commonly used cognitive measure designed to assess the course of decline in progressive dementias. However, little information is available about possible systematic racial bias on the items presented in this test. We investigated race as a potential source of test bias and differential item functioning in 40 pairs of African American and Caucasian d...

OBJECTIVES To develop and validate brief scales to measure common emotional and behavioural problems among adolescents in the examination-oriented education system and collectivistic culture of China. SETTING Middle schools in Hunan province. PARTICIPANTS 5442 middle school students aged 11-19 years were sampled. 4727 valid questionnaires were collected and used for validation of the scales...

OBJECTIVE To investigate cross-cultural validity of a newly developed Assessment of Children's Hand Skills (ACHS) in children with and without disabilities. SUBJECTS One group of 138 Australian children and 134 Taiwanese children, age range 2-12 years (a total of 149 typically developing children and 123 children with disabilities). METHODS Rasch model analysis was used to evaluate rating s...