This study examined the discriminability of lexigrams versus printed words with eight adults with severe mental retardation. A match-to-sample teaching paradigm was used. Subjects discriminated lexigrams better than printed letters and were more successful at matching lexigrams to referent objects than matching printed words to referent objects.…

RECENT RESEARCH ON THE DISCRIMINATION PROCESS INDICATES THAT ERRORLESS LEARNING CAN OCCUR IF STIMULI ARE CAREFULLY PROGRAMED SO THAT THEY ARE DISSIMILAR AND GRADUALLY BECOME MORE SIMILAR AS TRAINING PROCEEDS. TO ASSESS THIS APPROACH IN TEACHING THE LOWER- CASE LETTER B AND D WITH KINDERGARTEN SUBJECTS, TWO SETS OF STIMILI CONSTITUTED THE FIRST…

AN INSTRUMENT FOR MEASURING VISUAL DISCRIMINATION ABILITY WITHOUT CONFOUNDING VARIABLES OF MOTOR SKILLS HAS BEEN CONSTRUCTED. TO AVOID THE EYE-HAND COORDINATION USUALLY REQUIRED ON THESE TESTS, A SELECTION, RATHER THAN A DRAWING, RESPONSE WAS DEVELOPED. THIS TEST, THE UNIVERSITY OF CALIFORNIA AT LOS ANGELES DISCRIMINATION INVENTORY (VDI), CONSISTS…