Imitation, vocabulary, pretend play, and socially insightful behavior were investigated in 5,206 same- and opposite-sex 2-year-old twin pairs in the United Kingdom. Individual differences in imitative ability were due to modest heritability (30%), while environmental factors shared between twins (42%) and unique to each twin (28%) also made…

A sequence of behaviors consisting of appropriate responses, inappropriate responses, or a combination of both can be linked together in a behavior chain. Several operant processes may disrupt behavior chains. For example, one or more members of the behavior chain may be affected when reinforcement is withheld for the last response in the chain…

Do children have coexisting but contradictory beliefs about things like magic? Some patterns of behavior that seem to reflect contradictory beliefs may stem from children's recognition that their knowledge about events is incomplete and therefore things may occur without them understanding how. In addition, children may hold certain beliefs that…

In the present study, we used a probe-detection task to compare attentional allocation to the eyes versus mouth regions of the face in high-functioning boys with autism relative to normal control boys matched for chronological age and IQs. We found that with upright faces, children from both groups attended more to the eyes region than to the…

This article reviews evidence and theories concerning the nature of stimulus representations in Pavlovian conditioning. It focuses on the elemental approach developed in stimulus sampling theory (R. C. Atkinson & W. K. Estes, 1963; R. R. Bush & F. Mosteller, 1951b) and extended by I. P. L. McLaren and N. J. Mackintosh (2000, 2002) and contrasts…

Attempts to identify the root causes of individual stress have been made for centuries. The result has been the development of a myriad of approaches and explanations as to the cause of stress by psychologists, educators, researchers, and self-help authors. Each approach carries a degree of validity in the context that individuals experience…

This review critically examines the research findings which characterize the cognitive, behavioral, and neuroanatomical features of Williams syndrome (WS). This article analyzes 178 published studies in the WS literature covering the following areas: 1) General intelligence, 2) Language skills, 3) Visuospatial and face processing skills, 4)…

Although prejudice exists during childhood, it is unclear how attitudes toward peers of lower or higher academic ability and from one's own or a different racial group interact. This study qualifies previous research by showing that prejudice varies according to whether children are asked to evaluate peers based on academic ability, racial…

Resurgence refers to the recovery of previously extinguished responding when a recently reinforced response is extinguished. Although the topic of resurgence has received limited experimental attention, there recently have been an increased number of investigations involving the topic. This increased experimental attention also has been…

This article examines the case of Laura, a 9-year-old Mexican immigrant who officially "failed to learn English" in an American school. It may be more accurate to say that schooling failed Laura, and in ways that went beyond language learning. This diagnosis of failure is criticized, along with the individualistic and essentialist assumptions…

Objective: The authors' aim in this study was to determine, after adjustment for the effects of body mass index and socio-demographic measures, whether sex-specific weight control norms would have significant independent relationships with the weight control behavior of college women and men. Participants: The authors used an anonymous…

Children with developmental disabilities are slower to develop skills at intentional and symbolic communication than typically developing children, and may rely on atypical patterns of preintentional behaviors to support more complex communication development. The present study compared complex gaze engagement behaviors elicited by 25…

This article presents information on the development and validation of the Facial Expression Coding System (FACES; A. M. Kring & D. Sloan, 1991). Grounded in a dimensional model of emotion, FACES provides information on the valence (positive, negative) of facial expressive behavior. In 5 studies, reliability and validity data from 13 diverse…

Although information searching in hypermedia environments has become a new important problem solving capability, there is not much known about what types of individual characteristics constitute a successful information search behavior. This study mainly investigated which of the 2 factors, 1) natural characteristics (cognitive style), and 2)…

The main purpose of this study was to investigate and predict the behavioral intention of in-service Taiwanese kindergarten teachers regarding whether they would join a graduate level academic program. The research framework was based on the Theory of Planned Behavior (TPB) in order to identify the most influential component that affected their…