Describes two experiments that were conducted at the University of Illinois to determine how cognitive abilities of users of information retrieval systems and specific design features combine to create system usability. Logical reasoning and perceptual speed are examined, and reliability and validity are discussed. (Contains 12 references.) (LRW)

Journal editors respond to criticisms of reliance on statistical significance in research reporting. Joel R. Levin ("Journal of Educational Psychology") defends its use, whereas William D. Schafer ("Measurement and Evaluation in Counseling and Development") emphasizes the distinction between statistically significant and important. William Asher…

A detailed investigation is provided of Stout's statistical procedure (the computer program DIMTEST) for testing the hypothesis that an essentially unidimensional latent trait model fits observed binary item response data from a psychological test. Three refinements achieve greater power. The revised approach is validated using real data sets.…

Examined the usefulness of performance indicators in campus decision making at 20 institutions with Carnegie Baccalaureate II classification using hypothesis testing and case-study approaches. Performance measures most commonly cited as measures of financial viability were of limited use for specific policy development, but were most useful within…

Describes an experimental hypothesis-testing model of structural analysis designed to identify critical contextual variables associated with successful social interaction. Suggestions for general education settings are provided, with an emphasis on matching inclusive social environments to individual student antecedent variables. Strengths and…

Discusses the effects that information and communication technologies are having on education, particularly the introduction of online courses; and describes a study at the Ghent University that examines how students cope with a re-engineered course that is task-based and how it affects their learning styles. Examines the results from tested…

Investigates the responses of a sample of preservice biology teachers enrolled in a teaching methods course to a casual question about why water rose in a jar inverted over a burning candle placed in a pan of water by formulating and testing six hypotheses. (Contains 43 references.) (Author/YDS)

Discusses a six month project where pre-K-4 students in a music class explored whether humans were the only beings on earth who could sing or were musical. Explains that the music and science teachers collaborated on this project enabling the students to create hypotheses and test their observations on animals' musical abilities. (CMK)

If manufacturing a safer cigarette is technically possible--an open question--then mandating that tobacco manufacturers improve the safety of cigarettes would likely have both positive and negative implications for the nation's health. On the one hand, removing toxins may reduce the incidence of smoking-related diseases and premature mortality in…

Insects are a natural choice for studying behavioral ecology in the classroom--they are easy to obtain, maintain, and manipulate. Unlike competition and predation, however, the concept of group living does not translate well to small-scale experiments involving only a few individuals. How can inquiry be used to examine why animals live in groups?…

Based on a study by Cox (2004), this article deals with the needs of students with visual, hearing, and orthopedic impairments in terms of full access to school library media centers. Fictitious vignettes of student concerns as well as possible answers and thought-provoking questions expand Cox's rural Missouri-based study to a much wider audience…

This chapter explores how multiple approaches including data mining can help examine how the lengths of student enrollment are associated with varying numbers of advanced placement units. (Contains 3 tables and 5 figures.)

In this paper the authors test the hypothesis that local economic concentration is associated with decreased levels of civic participation. They define economic concentration as a social context in which a small number of corporate establishments or industries dominate a local economy. They argue that economic concentration leads to a monolithic…

This study tested hypotheses of the Integrative Contextual Model of Career Development (R. T. Lapan, 2004a) by investigating the multivariate effects of 6 interrelated career development skills (career exploration, person-environment fit, goal setting, social/prosocial/work readiness, self-regulated learning, and the utilization of social…

The purpose of this study was to determine whether data distribution changes as a result of motor skill practice or learning. The data on three dependent measures (movement time; MT), percentage of movement time in primary submovement (PSB), and movement jerk (JEK) were collected at baseline and practice Blocks 1 to 5. Sixty 6-year-olds,…