This paper presents an illustration of how the regression-discontinuity design can be used to obtain an unbiased estimate of the causal effect of participating in a university remedial English program on first-year grade point average. First-year grade point averages were collected for 197 first-time, full-time university students, along with the…

This paper focuses on the influence of high school science class size on students' achievement in introductory college science courses and on the variation of teacher practice across class size. Surveys collected information about high school science class experiences from 2754 biology, 3521 chemistry, and 1903 physics students across 36 public…

Participants of stuttering treatment programs provide an opportunity to evaluate persons who stutter as they demonstrate varying levels of fluency. Identifying physiologic correlates of altered fluency levels may lead to insights about mechanisms of speech disfluency. This study examined respiratory, orofacial kinematic and acoustic measures in 35…

The Dawn Project is a system of care responsible for creating and implementing an interagency collaborative approach to service provision. Systems of care are spectrums of services organized to meet the needs facing youth with serious emotional and behavioral difficulties. This study examined the relationship between school involvement in the Dawn…

Research on student achievement within the University of Chicago School Mathematics Project (UCSMP) and Core-Plus Mathematics Project (CPMP) at the secondary level is beginning to accumulate, however, much less is known about how prepared these students are for post-secondary education. Therefore this study involving students within one tracked…

Background: Epistemological beliefs are subjective theories of the structure and acquisition of knowledge. The instruments used to measure epistemological beliefs in educational psychology (see Duell & Schommer-Aikins, 2001) typically consist of questionnaires tapping general, decontextualized beliefs about knowledge or knowledge acquisition in a…

An investigation was conducted into the visual and auditory temporal processing profiles of two groups of 4- to 6-year-old children: "pre-alphabetic" children, who showed no alphabetic ability (failing to read any non-words in a test), and those who demonstrated some alphabetic ability. This "alphabetic" group showed higher scores in reading and…

This study examined the relationship of academic achievement to time perspective (future, present) and school membership (belonging, acceptance, rejection) among 232 low-income, urban African American adolescents. Findings indicated positive, significant relationships among academic achievement, future time perspective, school belonging, and…

Although there is evidence for a close link between the development of oral vocabulary and reading comprehension, less clear is whether oral vocabulary skills relate to the development of word-level reading skills. This study investigated vocabulary and literacy in 81 children aged 8 to 10 years. In regression analyses, vocabulary accounted for…

Optimal learning occurs when students are interested in the subject matter, are motivated with challenging and quality learning opportunities, and when immersed in atmospheres that make learning enjoyable. One technique to promote optimal learning is through the use of constructive controversies. The purpose of this study was to provide an example…

Previous research has shown that at least 10% of parents report significant levels of disillusionment with their child's school. The present paper addresses two questions arising from this earlier research. (1) Do teachers recognise complaints from parents? (2) Is there a possible relationship between teachers' perceptions of complaints from…

The present study examined the role of verbal working memory (memory span and tongue-twister), two-character Chinese pseudoword reading (two tasks), rapid automatized naming (RAN) (letters and numbers), and phonological segmentation (deletion of rimes and onsets) in inferential text comprehension in Chinese in 31 less competent comprehenders…

Two rating studies demonstrate that English speakers willingly produce reduced relatives with internal cause verbs (e.g., "Whisky fermented in oak barrels can have a woody taste"), and judge their acceptability based on factors known to influence ambiguity resolution, rather than on the internal/external cause distinction. Regression analyses…

Describing a computing algorithm for multiple regression which promotes intuitive understanding rather than memorization for students in statistics is the focus of the article. (Author/JR)

Variable selection techniques in stepwise regression analysis are discussed. In stepwise regression, variables are added or deleted from a model in sequence to produce a final "good" or "best" predictive model. Stepwise computer programs are discussed and four different variable selection strategies are described. These…