Working memory capacity plays a major role in many applied contexts, and it is important to be able to accurately measure this construct. The current studies tested whether the modality of administration of the letter-number sequencing task affects performance on the task. The letter-number sequencing task is a working memory capacity measure…

Various experiments demonstrated that the difficulty level of several performance-type intelligence test tasks is determined directly by stimulus and task variables that vary the information to be processed. The implications of these findings for intelligence and the problems of an experimental approach to the measurement of intelligence are…

This study compared the effectiveness of three different video-based instructional sequences, all used in conjunction with the system of least prompts, for teaching three different daily living skills to three young adults with developmental disabilities. The video-based instructional sequences (i.e., video rehearsal, video rehearsal plus photos,…