Discrimination shift performance of children as a function of age and shift procedure.

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Abstract
THE DISCRIMINATION SHIFT BEHAVIOR OF CHILDREN WAS STUDIED WITHIN A 2 * 2 * 2 FACTORIAL DESIGN WHICH VARIED AGE OF S (4 VS. 10 YR.), TYPE SHIFT (REVERSAL, RS, VS. EXTRADIMENSIONAL, EDS), AND STATE OF THE IRRELEVANT DIMENSION DURING SHIFT (CONSTANT VS. VARIABLE). THE 10-YR OLDS DID NOT DIFFER IN SPEED OF LEARNING RS AND EDS UNDER THE CONDITION OF A CONSTANT IRRELEVANT DIMENSION BUT LEARNED RS FASTER THAN EDS WHEN THE IRRELEVANT DIMENSION WAS VARIABLE. THE 4-YR-OLDS ACCOMPLISHED EDS MORE RAPIDLY THANRS REGARDLESS OF THE STATE OF THE IRRELEVANT DIMENSION. BOTH TYPES OF SHIFT WERE LEARNED MORE SLOWLY BY THE 10-YR-OLDS WHEN THE IRRELEVANT DIMENSION VARIED THAN WHEN IT WAS CONSTANT, BUT THE SHIFT PERFORMANCE OF THE 4-YR-OLDS WAS NOT SIGNIFICANTLY AFFECTED BY THIS VARIABLE. (15 REF.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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