Infants in four age groups--three, six, nine and twelve months--were exposed to an experimental procedure designed to assess the extent to which such subjects were capable of discriminating between different orientations of the same form, and the extent to which they were capable of recognizing the identity between different orientations of the…

The structure of the testing condition is an important variable in measuring young children's language comprehension. This study examined effects of two testing conditions on the language comprehension scores of 24 toddlers, mean age 20.3 months. The methodology was based on the rationale that a test which allows parents to select stimuli which…