The aim of this study was to investigate the effect of focus of attention on learning dart throwing in mentally retarded children. In this quasi-experimental study. 22 mentally retarded boys (age 10-12 years old) were randomly selected according to IQ (50-70) and were assigned to two homogenous attention (internal. external) groups after the pretest and a training session according to... https://foldlyers.shop/product-category/arduino-modules/