To date, virtually no studies have examined toddlers' non-response in developmental tasks. This study investigates data from 3667 toddlers to address (1) whether two aspects of non-response (completion and engagement) are separable, (2) how stable these aspects are from ages two to three, (3) how non-response relates to background characteristics,…

The present study illustrates the usefulness of finite mixture of generalized linear models (GLMs) to examine variability in cognitive strategies during childhood. More precisely, it addresses this variability in set-shifting situations where task-goal updating is endogenously driven. In a task-switching paradigm 5-6-year-olds had to switch…

The response set effect has been observed in a number of developmental tasks that are proposed to required inhibition. This effect has been interpreted as evidence that the specific responses children plan to make in these tasks become prepotent. Here we investigated whether there is a response set effect in the hand game. In this task, children…

Twenty-five one-year-olds were administered two tasks (each of which consisted of a familiarization stage followed by a recognition stage) in order to determine whether infants can recognize the shapes of objects by touch alone. (CM)

Explores a methodology for determining if young children's responses to a specific training procedure could be identified as "learning" or "development." Twelve nonconserving kindergartners were administered a standard conservation of substance task, and three variations of the same task. (CM)

This study was designed to determine if: a) attentuation of irrelevant information on a selective attention task would result in increased selective attention, and b) a developmental increase in selective attention would be replicated with the use of a different procedure of data analysis than has been used previously. (Author/CS)

The role of motor activity in children's formation of dynamic mental imagery was investigated in 2 experiments using a paired-associate recognition task. (Authors)

This paper describes a series of longitudinal experiments which dealt with the development of object awareness in infants, ages 6-18 months. The experiments were designed to document and evaluate Piaget's account of this development. The studies focused on two types of phenomena: (1) when infants first find an object hidden in one place, they will…

A taxonomy of response processes has been developed to facilitate the designing of training programs; each kind of task presumably would require a different set of training methods for greatest efficiency, so classifying a task would be part of determining which methods to use. A pool of response distinctions was collected, with special attention…

Reports a series of studies conducted to investigate possible differences in the exploratory manipulation and play behavior of human infants 7-1/2- 11-1/2 months of age as a function of the attributes of the stimulus, the familiarity of the subject with the stimuli, the age and sex of the infants, and individual differences. (Author/CS)

Kindergarten, second-grade, fifth-grade, and college subjects were tested in a serial-position recall task under each of four conditions: Visual stimuli/visual recall cue, visual stimuli/auditory recall cue, auditory stimuli/visual recall cue, auditory stimuli/auditory recall cue. Visual stimuli were pictures of common animals and objects;…

The basic hypotheses were (1) children with detailed exposure to objects would increase in knowledge of the complexity of objects but would also exhibit a corresponding increase in object-picture discrepancy, (2) children exposed only to pictures would show minimal object-picture discrepancy but would exhibit a lower response repertoire, and (3)…

This appendix includes seven papers which focus on various aspects of the learning processes of children ages 5-7: (1) S. Thompson, "Transitions to concrete operations: A survey of Piaget's writings" (in outline form); (2) S. H. White, "Changes in learning processes in the late preschool years," an examination of cross-cultural…