This paper describes the apparatus and test items of a closed-field test of rat intelligence. This method is adaptable to other animal species and has the important advantage of measuring intelligence by analysis of qualitative behaviour rather than by inference from learning scores. Data indicating the reliability and validity of the method are presented.

However, preferred hand performance was superior on a1-most al1 tasks. It was suggested that preferred hand performance is characterized by "Automatization" of the skills involved in hand performance. The results cast serious doubt on the ~lidity of using questionnaires of hand preferences to measure the degree of established handedness.

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Three investigations are reported which indicate that infants between four and seventeen weeks of age are able to detect sorne differences in sounds upon which phonemic contrasts are based. using a procedure where the presentation of sound was contingent on non-nutritive sucking, the babies demonstrated their ability to detect the difference be-tween /b/ and /p/ and between /d/ and /t/. The implications of these findings for Jakobson's theory of phonemic development are discussed.

The purpose of the experiment was to discover whether syntactic structure faci1itates reca11 in good readers, and whether, this effect exists in chi1dren who are poor readers. A paired-associate task equated the two groups on their abi1ity to associate simple, fami1iar words. Each child was taught with a tape recorder, four 1ists, composed of nonsense e1ements, and grammatical markers; two of which, were syntactica11y structured, the other two, unstructured. The good readers 1earned the structured 1ists more rapid1y than the unstructured 1ists.The poor readers 1earned both kinds of 1ists with equa1 difficu1ty.There was no difference between the good reader's and the poor reader's abi1ity to retain the unstructured materia1. Rence, the locus of the facilitation effect lies in the syntactic cues, imp1icit in the structured 1ist.