The study, with 32 adolescents with mild mental retardation and controls, found that imagery practice facilitated the execution of the reaction time component of a motor task and sometimes facilitated performance of the movement time component of the motor task. (DB)

This study assessed the differential effectiveness of two types of response delays on correct responding (with communicative gestures) by three individuals with severe mental handicaps to training instructions. Results showed that response delay was effective in increasing the number of correct responses in two of the three individuals. (DB)