This study sought to assess the ontogenetic course of three classes of size-value phenomena. Size-value phenomena refers to the observation that valued and neutral objects physically equal in size are judged as unequal. Results are discussed in terms of perceptual development. (ST)

Two experiments sought to determine whether rehearsal strategies constitute a primary determinant to age-related changes in auditory short-term memory. (ST)

The effect of grammatical phonological rules (those in English) and nongrammatical (those in other languages) on the learning and reproduction of morpheme-length utterances and the role of maturation on this effect were examined. Children preschool through second grade were the subjects. There were no significant differences at any grade level…

Major Purpose of the study was to investigate the extent to which aggressive retaliation in boys at three age levels is influenced by two dimensions of hypothetical provocation: accidental versus intentional and verbal versus physical. (Authors/CB)

Subjects from urban and rural Yucatan were tested on a short-term and incidental memory task. Urban subjects were in school, whereas most rural subjects were not. Results indicated that formal schooling is an important factor in the development of mnemonic skills in short-term memory. (ST)

Results suggest that the human infant's response to visual stimulation undergoes change during the neonatal period. (Authors)

Study is an initial effort at determining the sequence and developmental level at which children first use a variety of situational variables in making decisions concerning the appropriateness of various types of aggressive responses. (Authors)

Egocentric children were shown to have inadequate social schema to understand the adult meaning of conformity and independence. (Author)