THE MERITS OF VISUAL AND AUDITORY STIMULI AT EACH STAGE OF THE LEARNING PROCESS WERE PRESENTED IN THIS WORKING PAPER. SPECIAL ATTENTION WAS GIVEN TO THE DIFFERENCES IN RESPONSES REQUIRED AT EACH STAGE AND THEIR CONTROL BY THE NATURE OF THE LEARNING TASK. THE PROBLEM WAS APPROACHED BY A CONSIDERATION OF THE BASIC PROPERTIES OF WORDS AND PICTURES…

THIS COMPARATIVE ANALYSIS OF PRODUCTIVE THINKING IN RETARDED AND NONRETARDED CHILDREN USED DATA FROM A SAMPLE OF 78 PUBLIC SCHOOL CHILDREN DIVIDED INTO THREE GROUPS--(1) MENTALLY RETARDED CHILDREN IN SPECIAL CLASSES, (2) RETARDED CHILDREN IN REGULAR CLASSES, AND (3) NONRETARDED CHILDREN IN REGULAR CLASSES. THE GROUPS WERE SELECTED SO THAT THERE…