Testing Pollack's hypothesis that decreases in effective contour contrast (resulting from a decrease in receptor sensitivity with age or from a change in actual stimulus contrast) lead to decreases in illusion magnitude. Conclusions are questioned by Sjostrom and Pollack (PS 501 740). (Author/MB)

Glanzer and Clark's verbal loop hypothesis" appeared to be contradicted by these data. (Author)

Results demonstrate that 12 - 15 - week-old male infants smile to nonsocial stimuli, and offers support for the recognition hypothesis of infant smiling. (Authors/MB)

Three studies are reported which investigated the role of four variables in semantic generalization: Intentional versus Incidental learning instructions, associative and semantic relationships of the generalization stimuli (GSs) to the critical stimuli (CrSs), and rate of CrS presentation. (Author)

Evaluation to determine if identical illustrations used in learning and testing situations are equally effective for boys and girls of the same grade level. Subjects were members of grades 9, 10, 11, and 12. (AJ)

Outline faces were presented for rating along six dichotomous attributes with features varying systematically. Differences were found to be largely attentional, with certain features invariably being differentially employed and associated with certain attributes across all samples. (WY)

Results of an experiment in which two speech sounds were presented simultaneously to the two ears in normal and unilaterally brain-damaged subjects suggest a role for the nondominant cerebral hemisphere in processing and/or storage of competing speech stimuli. (KW)