As reporting of effect sizes in evaluation studies has proliferated, researchers and consumers of research need tools for interpreting or benchmarking the magnitude of those effect sizes that are relevant to the intervention, target population, and outcome measure being considered. Similarly, researchers planning education studies with social and…

Procrastination is one of the issues affecting more than half of the student population and is known to impact them negatively. It is also one of the major reasons for failure and dropout. Therefore, several studies have been conducted in this domain to understand when and why students procrastinate. The existing studies use self-reported…

Mobile devices have been increasingly utilized in informal learning because of their high degree of portability; mobile guide systems (or electronic guidebooks) have also been adopted in museum learning, including those that combine learning strategies and the general audio-visual guide systems. To gain a deeper understanding of the features and…

Proportion compatible manipulations are often used to index strategic processes in selective attention tasks. Here, a subtle confound in proportion compatible manipulations is considered. Specifically, as the proportion of compatible trials increases, the ratio of complete repetitions and complete alternations to partial repetitions increases on…

Visual inspection of data is a common method for understanding, responding to, and communicating important behavior-environment relations in single-subject research. In a field that was once dominated by cumulative, moment-to-moment records of behavior, a number of graphic forms currently exist that aggregate data into larger units. In this…

Assessment of the neurotransmitter dopamine through measurement of the dopamine metabolite homovanillic acid (HVA) in adult subjects with mental retardation and with high rates of body stereotypy (n=12), compulsive behaviors (n=9), or neither (n=12) found lowest HVA concentrations in the stereotypy group and highest in the compulsive group. (DB)

During the past 20 years, a significant body of literature has emerged focusing on the application of Dabrowski's theory of positive disintegration (TPD) to the study of gifted individuals. Although much of this literature is prescriptive, some research reports spanning this time period are available. A perusal of research on TPD's applicability…

The article describes current research on stereotypes in a group of blind children in Barcelona, Spain. Mannerisms and blindisms covering a range of verbal and motor behavior are defined and discussed, as are the variables of behavior related to them. (Author/DB)

The variability of stereotypic body-rocking motions of eight adults with severe/profound mental retardation was examined through kinematic analysis and compared to a matched nonretarded group of adults. Inter- and intra-individual variability was, on average, higher for the individuals with mental retardation. Results suggest that low variability…

The relationship between preferred objects associated with stereotypy, stereotypic behavior, and accuracy of responding during a counting task by a child with autism was analyzed. Teaching with high-preference objects occasioned more stereotypic behavior and less accurate counting than teaching with medium- and low-preference objects. (Author/DB)

The ability of three-year-old children to deceive was examined in order to determine whether they were able to hide their emotional expression intentionally. Results indicated that very young children have begun the process of learning how to mask their emotional expressions and support the role of socialization in this process. (RH)

Four studies analyzing body-rocking in individuals with mental retardation found: (1) rocking chairs are not necessarily preferred and produce higher amplitude rocking; (2) body-rocking characteristics were stable over a 21-month period; (3) when compared with body-rocking college students, persons with mental retardation engage in more…

The facial stereotypies of adults diagnosed as having mental retardation and tardive dyskinesia were examined through a kinematic analysis of videotaped lip and tongue movements. The high degree of movement variability found suggests that low variability of discrete properties of movement kinematics may not be a defining feature of stereotypies.…

The dimensional structure of adaptive behavior of mildly, moderately, and severely mentally retarded people was investigated using item and parcel factor analyses of the Client Development Evaluation Report with about 10,000 subjects. A stable six-factor structure of adaptive behavior was identified. (Author/DB)

Determines the time course of circulating cortisol following circumcision in 80 healthy newborns and investigates whether changes in behavioral state following circumcision in anyway paralleled the adrenocortical time course. Adrenocortical and behavioral data indicated that subjects were able to cope with circumcision trauma. Cortisol levels…