Available approaches for determing significant differences between various groups are considered for use when the homogeneity of slopes precludes standard analysis of covariance. The advantages and statistical procedures for relating to a reference group are presented and criteria are suggested for choosing the best groups. (Author)

The objective of this study was to determine the effectiveness of a district-wide professional development effort based on a modified Ramp-Up Program, designed to help high school teachers improve the reading skills of their students. Ramp-Up is a two-year course that seeks to accelerate the learning progress of entering high school students who…

In the last few decades, the Language Policy Division of the Council of Europe restructured its efforts to help European citizens learn European languages for survival purposes to facilitate travel and work throughout Europe. With the idea of daily language use and plurilingual competence in mind, it published the Common European Framework of…

The characteristics of missing data in statistical analysis are outlined, and techniques to deal with missing data are explored using a real data set that contained pretest and posttest measures of kindergarten children. In the first part of the investigation, randomly created missing values for 5%, 10%, 20%, and 25% of the sample were supplied…

Sixty subjects, 30 volunteers and 30 nonvolunteers, participated in an experiment examining pretest sensitization effects. Two interpretations of these effects--the commitment hypothesis and the demand interpretation--are explored. (Author)

How the validity of gain scores varies with the standard deviations of pretest and posttest scores and the correlation between the two are analyzed. Earlier findings that under realistic testing conditions difference scores can have excellent predictive value are supported. Conditions under which gain scores have optimum validity are specified.…

The purpose of this study was to investigate the effects of multiple intelligences (MI) teaching approach on 8th Grade students' achievement in and attitudes toward science. This study used a pretest-posttest control group experimental design. While the experimental group (n=30) was taught a unit on acids and bases using MI teaching approach, the…

Experiments that assign intact groups to treatment conditions are increasingly common in social research. In educational research, the groups assigned are often schools. The design of group-randomized experiments requires knowledge of the intraclass correlation structure to compute statistical power and sample sizes required to achieve adequate…

Internship experience is a valuable component of an undergraduate degree. This is especially true in leadership education programs, where leadership development may take place in a variety of contexts. Theory purports reflection enhances a learners' experience through a linkage of education, work, and personal development (Kolb, 1984). It is not…

In an effort to improve active learning in introductory statistics, we introduce the use of concept mapping techniques as part of the course. While previous papers have touted the use of this and other interactive teaching methods in statistics education, we add to this literature by providing additional assessment of its efficacy. This comes…

Multiple Intelligence Based Teaching (MIBT) applies the multiple intelligence theory in the process of teaching and learning. MIBT explores and develops the intelligence of the students. Also, it teaches the content in a multiple way to the students. The objective of the present study is to find out the effectiveness of multiple intelligence based…

This paper compares five growth measures using the High School and Beyond database. The measures are: (1) simple gain (posttest minus pretest); (2) difference between group means; (3) percentage of students who scored higher on the posttest than the pretest; (4) percentage of items missed on the pretest which are subsequently answered correctly on…

Many people take for granted the use of language as a tool for coping with everyday occupational and social problems. However, there are those, such as prison inmates, who have difficulty using language in this manner. Realizing that prison inmates are not always able to communicate effectively through standard patterns of speech and thus are…

A pretest-posttest design for measuring the effects of educational programs uses comparison groups consisting of pupils like those in the treatment group but not getting that particular treatment. Although the design is geared primarily to evaluation of Title I programs in large cities, it should also apply to other situations. The plan for…

The purpose of this paper is to demonstrate the use of the general linear model (GLM) in problems with repeated measures on a dependent variable. Such problems include pretest-posttest designs, multitrial designs, and groups by trials designs. For each of these designs, a GLM analysis is demonstrated wherein full models are formed and restrictions…