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Xu, Fei – Cognition, 2003
Two experiments compared 6-month-olds' numerosity discrimination performance on both large numbers and small numbers with both total filled area and total contour length controlled. Results showed that infants succeeded in discriminating 4 from 8 elements, but failed to discriminate 2 from 4 elements, providing evidence for the existence of two…
Descriptors: Comparative Analysis, Discrimination Learning, Infant Behavior, Infants

Field, Jeffrey – Child Development, 1976
Videotapes were made of the prehensile activity and looking behavior of 2- and 5-month-old infants in the presence of objects placed within and beyond possible contact distance. (BRT)
Descriptors: Comparative Analysis, Discrimination Learning, Distance, Infant Behavior

Bahrick, Lorraine E.; Gogate, Lakshmi J.; Ruiz, Ivonne – Child Development, 2002
Three experiments investigated discrimination and memory of 5.5-month-olds for videotapes of women performing different activities (blowing bubbles, brushing hair, brushing teeth) or static displays after a 1-minute and a 7-week delay. Findings demonstrate the attentional salience of actions over faces in dynamic events to 5.5-month-olds. Findings…
Descriptors: Attention, Comparative Analysis, Discrimination Learning, Infant Behavior

Olsho, Lynne Werner; And Others – Developmental Psychology, 1987
Describes observer-based technique for assessing auditory capacities of infants from three to 12 months of age. This technique, referred to as the Observation-based Psychoacoustic Procedure (OPP), combines features of the Forced-choice Preferential Looking Technique and of the Visual Reinforcement Audiometry. Pure-tone detection and frequency…
Descriptors: Audiometric Tests, Auditory Evaluation, Auditory Perception, Auditory Stimuli
Kagan, Jerome; And Others – 1975
This is a partial report of a longitudinal investigation designed to assess the psychological effects of an experimentally conducted day care program on children during the first 30 months of life. The experimental subjects were Chinese and Caucasian children from working and middle class families who were cared for at a special group care center…
Descriptors: Attachment Behavior, Attention, Child Development, Child Rearing