Suggests that researchers should report the results of appropriate significance tests and the effect sizes associated with each test. Discusses the roles of textbook authors, publication manuals, and journal editors in leading the movement to better statistical reporting. (SLD)

Documents the recent use of one-tailed F-tests in communication journals, and examines the arguments both for and against their use. Examines the use of these tests within the broader unresolved controversy surrounding the use of one-tailed tests. Recommends that future researchers should most often avoid one-tailed Fs, and generally exercise…

Shares three ideas concerning how to evaluate the practical importance of developmental findings to make them more useful to policymakers: (1) statistical significance tests need to be accompanied by effect size estimates; (2) meta-analyses are helping in using all existing data when examining issues involved in policy debates; and (3) researchers…

During the last several years, researchers have been garnering evidence concerning the benefits of service-learning, and urging its inclusion in the curricular mainstream. This study presents evidence that college students manifest long-lasting, if modest, academic benefits from participating in service-learning. The academic records of 477…

In response to the increasing call by professional organizations, journal editors, and statisticians to include not only derived significance levels from quantitative statistical procedures but also measures of effect sizes (ES), this article first provides a rationale for school counseling-related researchers to include these key indices in their…

Since the 1993 APA task force of the Society of Clinical Psychology developed guidelines to apply data-based psychology to the identification of effective psychotherapy, there has been an increasing number of texts focussing on Empirically based Psychotherapy and Empirically Supported Treatments. This manuscript examines recent key texts and…

Effect Sizes (ES) are an increasingly important index used to quantify the degree of practical significance of study results. This paper gives an introduction to the computation and interpretation of effect sizes from the perspective of the consumer of the research literature. The key points made are: (1) "ES" is a useful indicator of the…

The year 2000 US presidential election between Al Gore and George Bush has been the most intriguing and controversial one in American history. The state of Florida was the trigger for the controversy, mainly, due to the use of the misleading "butterfly ballot". Using prediction (or confidence) intervals for least squares regression lines…

This article reflects upon the theories and methodologies that inform peace studies teaching and research practice. It explores the challenges faced by tertiary educators working within the narrowing confines of current university structures, and, by analysing the motives, process and methodologies that have shaped one particular program, suggests…

This manuscript examines the practical differences between quantitative and qualitative inquiry by comparing the differences between one article from each paradigm. Quantitative research differs greatly from qualitative inquiry in purpose, assumptions, methodology, and representation. While quantitative research has been the dominant paradigm for…

The aims of this study were to evaluate reliability and validity of the Students' Perception of Assessment Questionnaire (SPAQ), to evaluate students' perception on assessment, and to evaluate gender-based, grade-based, and ethnicity-based differences in students' perceptions. The validity and reliability coefficients revealed that the SPAQ was…

Objective: This paper examined the relationship between exposure to sexual and physical abuse (CSA and CPA) in childhood and later educational achievement outcomes in late adolescence and early adulthood in a birth cohort of over 1,000 children studied to age 25. Method: Retrospective data on CSA and CPA were gathered at ages 18 and 21 and used to…

Recent research on principles of best practice for designing effective multimedia instruction has rarely taken into account students' alternative conceptions, which are known to strongly influence learning. The goal of this study was to determine how well students of quantum mechanics could learn "vicariously" by watching a student-tutor dialogue…

In a birth cohort prenatally exposed to rubella, we assessed whether prospectively documented premorbid neuromotor dysfunction, mannerisms, deviant behaviors, and temperament during childhood and adolescence were impaired in cases who developed depressive disorder (DD) relative to rubella-exposed controls and cases who developed schizophrenia…

This is the Phase I report for a needs assessment and accompanying study sponsored by the Oklahoma State Department of Education which was conducted during the 2010 calendar year. This report seeks to determine the importance of nine essential elements to being classified as a school in need of improvement. 61 schools are involved in this study…