An operant conditioning technique was used to study visual discrimination of simple patterns by infants aged 6-12 weeks. The appropriate direction of head turning to the patterns was developed and maintained by social reinforcement. Results showed that visual discriminative control of the direction of head turning can be achieved. (WY)

Presents results of two experiments which measured contrast sensitivity function in infants. Information concerning development of visual acuity, low frequency attenuation, and sensitivity to contrast were collected. Results provide an approximate picture of and means for detection of infants' pattern information. (Author/DB)

Three experiments are reported which attempt to provide a basis for assessing the importance of word shape for beginning readers. Kindergarten and first grade students chose from an array the response alternatives that most resembled a nonsense stimulus trigram or quingram. (GO)

In three experiments, three normal preschoolers were presented with sorting tasks ordinarily insoluble for four-year-olds. Found that, although the subjects had difficulty correctly sorting the pictures when told what criterion to sort by, they could provide correct answers when asked what they were looking for. This self-instructional effect was…

Presents two experiments which investigated whether there is a shift with age in the relative speed and difficulty of same versus different judgments. Subjects included preschoolers, third graders, and college students. (SDH)