Stimulus discriminability,contingency discriminability,and schedule performance

A detection-theory model to describe the effects of varying stimulus disparity on switching-key concurrent variable-interval schedule performance (Miller, Saunders, & Bourland, 1980) is presented. It describes the available data on stimulus disparity well. Using the additional notion of contingency discriminability, the model is then developed into an account of schedule and stimulus control that is both wider in application and conceptually clearer than the generalized matching law. A basic assumption of the new model is that subjects may not perfectly discriminate that a reinforcer followed a response of one class versus that of another, and this ability is measured as reinforcer-contingency discriminability, d_r. This idea is then applied to performance in signal-detection procedures, both with and without error reinforcement, to multiple-schedule performance, and to single-schedule performance. The model fitted the data well, and it thus constitutes a coherent and viable alternative to the generalized matching law in the procedures and conditions in which the latter has been shown to apply.     

Maternal interaction,private speech,and task performance in preschool children

This study examined the correspondence between ontogenetic and microgenetic change in private speech, the association of private speech with task performance, and the relationship of maternal interaction during a teaching session to preschoolers' verbal self-regulation and success in independent problem solving. Thirty 4- and 5-year-olds were observed while their mothers assisted them in solving two challenging tasks. In three subsequent sessions, children's private speech and performance were tracked as they worked on tasks requiring skills similar to those taught in the mother-child session. Correspondences between age- and session-related trends in private speech and task performance appeared that are consistent with Vygotsky's assumption that private speech undergoes progressive internalization with increasing cognitive competence. Contrary to Vygotskian assumptions, utterances accompanying action were not replaced by those preceding action (planning statements) with advancing age and task mastery. Private speech predicted gain in task performance more effectively than concurrent performance. A global index of authoritative parenting was a better predictor of private speech and task performance than were microanalytic measures of scaffolding, suggesting that microanalytic indices may miss critical features of maternal teaching behavior that promote transfer of cognitive strategies from adult to child.     

Perceptual causality in children

Three experiments considered the development of perceptual causality in children from 3 to 9 years of age (N = 176 in total). Adults tend to see cause and effect even in schematic, two-dimensional motion events: Thus, if square A moves toward B, which moves upon contact, they report that A launches B--physical causality. If B moves before contact, adults report that B tries to escape from A--social or psychological causality. A brief pause between movements eliminates such impressions. Even infants in the first year of life are sensitive to causal structure in both contact and no-contact events, but previous research with talking-age children found poor verbal reports. The present experiments used a picture-based forced-choice task to reduce linguistic demands. Observers saw eight different animations involving squares A and B. Events varied in whether or not these agents made contact; whether or not there was a delay at the closest point; and whether they moved rigidly or with a rhythmic, nonrigid "caterpillar" motion. Participants of all ages assigned events with contact to the physical domain and events without contact to the psychological domain. In addition, participants of all ages chose causality more often for events without delay than with delay, but these events became more distinct over the preschool range. The manipulation of agent motion had only minor and inconsistent effects across studies, even though children of all ages considered only the nonrigid motion to be animal-like. These results agree with the view that perceptual causality is available early in development.     

Perceptual training of height and brightness seriation in kindergarten children.

A study of seriation was conducted from the perspective of Gibson's theory of perceptual development. Kindergarten children who evidenced little seriation of height or brightness were assigned to either 1 of 3 perceptual training conditions or to a fourth, control condition. Training consisted of nonreinforced same-different judgments to wooden dowels varying in height, or in brightness, or simultaneously in height and brightness. The theoretical rationale for this training was that it would facilitate perception of the stimulus dimension(s) on which the dowels differed. It was found that perceptual training did facilitate seriation, particularly if both the height and brightness dimensions varied simultaneously in training.     

Comprehension monitoring in preschool children

This study examined the ability of 2 1/2-4 1/2-years-olds to recognize comprehension difficulties and to implement strategies for resolving them. In the course of a play interaction, an adult female experimenter made a series of requests, some of which were designed to be difficult for the child to understand or to execute. Children's responses to these requests were compared with their responses to control requests that were easy to comprehend and comply with 3-year-olds exhibited appropriate and selective monitoring responses for some kinds of problems but not others, while 4-year-olds displayed discriminative monitoring for all types of problems presented. In contrast to previous experimental findings, these results indicate that young children are capable of detecting a variety of comprehension problems and possess appropriate strategies for resolving these difficulties with a partner in communication.     

Effects of performance feedback and repeated experience on self-evaluation accuracy in high- and low-performing preschool children

European Journal of Psychology of Education - Accurate self-evaluation leads to better regulation of learning and better performance in elementary school children and acts as a predictor of future...     

Choice and goal-directed behavior in preschool children

Preschool children (3–4 years old) were trained to perform two actions to gain different outcomes, in the form of video clips from different cartoons, before one of these outcomes was devalued by noncontingent exposure. The effect of outcome devaluation was subsequently assessed in an extinction test by giving children the opportunity to perform both actions in the absence of any outcomes. When the two actions were trained concurrently, performance during the test was modulated by outcome value and children showed a preference for the action trained with the currently valued outcome. By contrast, when each action was trained separately on different trials, test performance was insensitive to outcome devaluation. These effects of the training schedules are interpreted in terms of dual-process theories of action control.     

Reward and ideational fluency in preschool children

This study examined the effects of rewards on the ideational fluency of 75 preschool children. Assigned to a reward or nonreward condition, the children were administered two ideational fluency tasks, Unusual Uses and Pattern Meanings. Analyses revealed a significant main effect for reward on the ideational fluency components of originality, total fluency, and flexibility. In all cases the rewarded subjects scored lower than the nonrewarded group. These findings support the growing body of evidence that rewards are detrimental to creative functioning.     

Links between socio-emotional skills,behavior, mathematics and literacy performance of preschool children in Serbia

European Journal of Psychology of Education - Young children’s socio-emotional skills are important for understanding their own and others’ behaviors and interactions. No study in...     

Early identification of developmentally disabled and at-risk preschool children.

This study examined child-centered data (from birth to 7 years) and familial factors as possible predictors of disabilities in adolescence. The sample was taken from original participants in the National Collaborative Perinatal Project in Rhode Island who were also judged as handicapped after school entry. Results of the current study indicated that parental traits (i.e., maternal education) are more accurate predictors of adolescent status than the child's own behavior from birth to 3 years, whereas child-centered skills assessed at 4 and 7 years of age are better predictors than are familial factors. Overall, data suggest that early identification models which focus upon developmental delay or adverse medical events from birth to 3 years of age are inadequate in fully identifying children eventually judged to be handicapped. Screening initiatives must be developed that are multivariate (child and family focused) and account for differential weights of risk factors over time.