This paper is a report of the Australian segment of an international multi-campus project centred on improving understanding of the Moon's phases for preservice teachers. Instructional strategies adopted for a science education subject enabled Australian participants to make extended observations of the Moon's phases and keep observational data…

Although the "efficacy" of Intensive Behavioral Intervention (IBI) for young children with Autism Spectrum Disorders (ASD) has been well documented in small model programs, IBI's "effectiveness" (i.e., does it work in the "real world"?) has been less studied and may not be as impressive, e.g. Bibby, Eikeseth, Martin,…

A stratified sample of 34 three-year-old to five-year-old boys and their parents (30 mothers) was observed in their homes during free-play and problem-solving interactions. Observer-ratings of behaviors of parents in each interaction were examined in relation to teachers' ratings of the boys' problem behaviors in a childcare setting. Parent…

In recent years, computer-based testing (CBT) has grown in popularity, is increasingly being implemented across the United States, and will likely become the primary mode for delivering tests in the future. Although CBT offers many advantages over traditional paper-and-pencil testing, assessment experts, researchers, practitioners, and users have…

With their realistic animation, complex scenarios and impressive interactivity, computer simulation games might be able to provide context-rich, cognitively engaging virtual environments for language learning. However, simulation games designed for L2 learners are in short supply. As an alternative, could games designed for the mass-market be…

The sampling distribution is a common source of misuse and misunderstanding in the study of statistics. The sampling distribution, underlying distribution, and the Central Limit Theorem are all interconnected in defining and explaining the proper use of the sampling distribution of various statistics. The sampling distribution of a statistic is…

Considered in this paper are a mathematical discussion and an algorithm, and a computer program for Fisher's test. (Author)

Examines the question of how large a sample must be in order to produce empirical Bayes estimates which are preferable to other commonly used estimates, such as proportion correct observed score. (Author/RC)

A procedure for testing heterogeneity of variance is developed which generalizes readily to complex, multi-factor experimental designs. Monte Carlo studies indicate that the Z-variance test statistic presented here yields results equivalent to other familiar tests for heterogeneity of variance in simple one-way designs where comparisons are…

As significance testing comes under increasing criticism, some researchers are turning to other indices to evaluate their findings. Included among the alternative options are the interpretation of effect size estimates and the evaluation of sample specificity (invariance testing). Using a hypothetical data set of 64 cases and two predictor…

Too often researchers rely upon the classical normal theory parametric tests to analyze non-normal data, even though the tests may not be robust to violations of that assumption. Fligner's class of two-sample tests for scale is an important development because the test is distribution-free and has desirable properties. This paper outlines the…

A new test for increasing or decreasing trend in a set of observations is presented. Rather than making specific paired comparisons, as in the Cox and Stuart tests for trend, the user of the new test makes the comparisons of all possible pairs of observations. (Author)

TO TEST THE ASSUMPTION THAT LEARNING EFFECTIVENESS VIA TV MIGHT DECLINE DUE TO LENGTHY VIEWING TIME AND FATIGUE, THIS STUDY COMPARED EFFECTS OF 38 HOURS OF CONTINUOUS TV TRAINING IN 5 DAYS WITH REGULAR CLASSROOM INSTRUCTION OVER THE SAME PERIOD. EFFECTIVENESS OF THE MINIMAL TV PRESENTATIONS THAT TRANSMIT EXISTING CLASSROOM INSTRUCTION WITH NO…