After adjustment for age and parental education, urban and rural Thai children performed similarly on BARS. Even when parental education was not controlled, performance of the urban and rural samples was quite similar except for speed of motor performance suggesting that although parental education was much greater in the urban sample, this made little difference in the performance of the children. Moreover, rural Thai children have much less access to extracurricular activities and their socioeconomic status is generally lower than urban children. Nevertheless, their performance
was comparable further validating the suitability of BARS for children of very different cultural and socioeconomic background.