Four possible situations in trend analyses in the analysis of variance are discussed: unequal sample sizes with unequal intervals, unequal sample sizes with equal intervals, equal sample sizes with unequal intervals, and equal sample sizes with equal intervals. (Author/JKS)

This study of the nature of the representations underlying children's knowledge of the pattern of daily activities tested the plausibility of three models that have been proposed to explain adults' representations of temporal patterns. The models could also account for previous demonstrations of young children's knowledge of the temporal order of…

Objective: To determine the empirical evidence for deficits in working memory (WM) processes in children and adolescents with attention-deficit/hyperactivity disorder (ADHD). Method: Exploratory meta-analytic procedures were used to investigate whether children with ADHD exhibit WM impairments. Twenty-six empirical research studies published from…

Normal participants (n=5) having no experience with antipsychotic drugs and medicated participants (n=5) with clinical experience with chronic low doses of haloperidol (3-10mg/day for 2-4 months) in the treatment of neuroses were evaluated for the effects of inter-trial interval (ITI) feedback on a discrete-trials peak-interval timing procedure.…

The purpose of the present study was to identify differences between cerebral hemispheres for processing temporal intervals ranging from .9 to 1.4s. The intervals to be judged were marked by series of brief visual signals located in the left or the right visual field. Series of three (two standards and one comparison) or five intervals (four…

Two experiments were performed to assess age-related changes in sequential effects on choice reaction time (RT). Sequential effects portray the influence of previous trials on the RT to the current stimulus. In Experiment 1, three age groups (7-9, 10-12, and 18-25 years) performed a spatially compatible choice task, with response-to-stimulus…

Duration and location of breaks in time interval production were manipulated in various conditions of stimulus presentation (Experiments 1-4). Produced intervals shortened and then stabilized as break duration lengthened, suggesting that participants used the break as a preparatory period to restart timing as quickly as possible at the end of the…

It is well known that the uniform limit of a sequence of continuous real-valued functions defined on an interval I is itself continuous. However, if the convergence is pointwise, the limit function need not be continuous (take f[subscript n](x) = x[superscript n] on [0, 1], for example). Boas has shown that the pointwise limit function of a…

The present study tested a formal, or purely mathematical, theory of matching, and a modern account derived by McDowell (1986) that incorporates deviations from strict matching--bias and sensitivity. Six humans pressed a lever for monetary reinforcers on five concurrent variable interval (VI) schedules of reinforcement. All schedules were…

Six experimentally naive rhesus monkeys produced 0.01 mg/kg/infusion cocaine by lever pressing under a tandem fixed-ratio 1 differential-reinforcement-of-other- behavior schedule. One lever press initiated an unsignaled 15- or 30-s delay culminating in cocaine delivery. Each press made during the delay reset the delay interval. With two…

Several researchers have suggested that conditioning history may have long-term effects on fixed-interval performances of rats. To test this idea and to identify possible factors involved in temporal control development, groups of rats initially were exposed to different reinforcement schedules: continuous, fixed-time, and random-interval.…

This case study was conducted to analyze what happened when administrators in Wedgewood School District mandated special and regular education teachers on the elementary level to begin a special education inclusion model. Teachers were not permitted to adopt their own models of inclusion and were given the five Lipsky and Gartner (1995)…

Computer assisted psychomotor training is recognized as an appropriate tool in motor skill acquisition in adults with and without physical limitations. In specialized populations of individuals with physical deficits such as Parkinson's disease, previous researchers have examined the application of computer assisted training during upper extremity…

In the current era of educational reform and accountability, co-teaching has emerged as a popular and widely implemented service delivery model for students with special needs. The intent of this inquiry was to examine the roles and responsibilities assumed by the elementary special educator during the practice of co-teaching. Using naturalistic…

The authors examined the effectiveness of motivational interviewing (MI) on club drug use and risky sex in non-treatment-seeking men who have sex with men (MSM). MSM (N = 150) were assessed and randomly assigned to 4 sessions of MI or an educational control intervention. Follow-up occurred at quarterly intervals for 1 year. Primary outcomes were…