Abstract
Reversal (R) and extradimensional (ED) shifts were studied in a large Jordanian sample which included six age groups (4, 5, 6, 9, 10, and 11 years). No sex differences were found. Consistent with other findings based on American samples, a highly significant Age by Shift interaction effect was found, reflecting the ease of executing a R relative to an ED shift at a very young age and the reversal of this effect at about 9 years of age. The results provide further support for the Kendlers’ two-stage mediational theory.
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