Examined the development of pattern recognition in infant pigtailed macaques using the familiarization novelty technique. Results indicate that by at least 200 days postconception subjects show a consistently reliable visual response to novelty. (Author/RH)

Reply by Jerome Kagan to a recent article by Block, Gjerde, and Block (1986) which questions the validity of the construct of reflection-impulsivity. Kagan alleges flaws in the logic of the authors' (Block, Gjerde, Block) position and in the inferences drawn from their data. (Author/RWB)

Responds to the arguments and evidence adduced by Kagan (1987) in his reply to the Block, Gjerde, and Block (1986) study questioning the validity of the Matching Familiar Figures Test (MFFT) as a measure of "reflection-impulsivity." (Author)

Examines developmental change in 4- 7- and 10-month-old infants' perceptions of correlations among attributes to determine whether relational information plays a role in abilities ranging from the perception and recognition of a simple pattern to the formation of a category. (HOD)

Measured the pattern goodness effect at visual encoding stages and short term memory stages in observers aged 6 to 22 years using a speeded sequential same-different paradigm. Found goodness effects were larger in short term memory for all subjects, memory effects decreased with age, and encoding effects remained constant. (SKC)

Investigates the relative influence of speech and pointing gesture information in the interpretation of referential acts among children averaging three and five years of age and adults. (HOD)