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…

THREE GROUPS OF FIRST- AND SECOND-GRADE CHILDREN, TWO LOWER-CLASS AND ONE MIDDLE-CLASS, WERE ASKED TO LEARN AND RECALL SEQUENCES OF WORDS AT FOUR LEVELS OF CONCEPTUAL DIFFICULTY--NONSENSE SYLLABLES, HIGH FREQUENCY NOUNS, ANOMALOUS SENTENCES, AND MEANINGFUL SENTENCES. IT WAS HYPOTHESIZED THAT THE STUDENTS' VERBAL MEMORY WOULD INCREASE WITH…