Argues that percent variance explanation is a misleading index of the influence of systematic factors in cases where there are processes by which individually tiny influences cumulate to produce meaningful outcomes. An example is the computation of percentage of variance in batting performance among major league baseball players. (Author/CB)

The value of variance is emphasized, and the element of design, frequently not adequately understood, is clarified to underscore the importance of variance to the researcher. Two analytic methods, analysis of variance (ANOVA) and multiple regression, are discussed in terms of how each uses/applies variance. Advantages and major difficulties with…

A dichotomous dependent variable is used to determine a combination of variables that will predict group membership. Dichotomous variables are frequently encountered in multiple regression analysis. However, several textbooks question the appropriateness of using multiple regression analysis when analyzing dichotomous dependent variables. The…

Describes study of 122 undergraduate and graduate students that contrasted the effects of two error correction procedures on student achievement when using computer assisted instruction. Analyses of variance were used to determine whether question type or error response affected subsequent responses to factual and higher cognitive questions.…

Describes a study of 31 undergraduate students that explored their preferences for and the relationships among text format variables in computer screen layouts. The design of 64 computer text types for the study is explained, results are analyzed, and further research questions related to learning strategies are suggested. (LRW)

Four methods were used to forecast monthly circulation totals in 15 midwestern academic libraries: dummy time-series regression, lagged time-series regression, simple average (straight-line forecasting), monthly average (naive forecasting). In tests of forecasting accuracy, dummy regression method and monthly mean method exhibited smallest average…

Reviews study of 30 graduate students that investigated the possible contribution of pictures to the recall and retention of information presented in written prose. The two variables considered were the durability of picture effects, and the effect on recall of information that was not pictured. (LRW)

Although technological innovations have been widely adopted in elementary schools, efforts to implement these have generally not been successful. Past research on innovation has largely ignored the social context in which implementation occurs. This research examines how the implementation of the microcomputer is affected by the traditional social…

Describes study of 42 first and second graders which was conducted to determine whether older siblings could enhance their comprehension of television programs. The hypotheses tested are discussed, research methodology using analysis of variance is explained, videotapes of sibling interaction are analyzed, and future research needs are suggested.…

Inconsistencies in the use of terminology to describe instructional treatments, confounding of discovery and expository methods with other aspects of instruction, and inconsistencies in defining independent and dependent variables within and between studies have all contributed to the lack of definitive conclusions about the effectiveness of…

One of the important components of the elaboration theory (Reigeluth, 1979) is the synthesizer, which provides information to relate and integrate a set of concepts and which can appear in different formats. This study investigated the effectiveness of three formats of post-instruction synthesizer on student recall of definitions of concepts and…

Examines the effects of such variables as socioeconomic status (SES), school size, grade span, type of computer, and student to computer ratio on the implementation of microcomputers. Analysis of a random sample of 128 elementary schools indicates that SES and student to computer ratio have the strongest impact on implementation. (Author/LRW)

Describes the development and testing of the Bath County Computer Attitudes Scale (BCCAS), which is designed to measure elementary and secondary school students' attitudes toward computers. Preliminary and revised versions are reviewed, and a analysis of data supports the validity of the BCCAS as a measure of computer attitudes. (Author/LRW)

Describes study of fourth and fifth grade students which explained the effect of graphics on student motivation in a microcomputer-based spelling drill program. The role of feedback in instruction is discussed, the impact of graphics on computer software is described, and results are analyzed. (4 references) (LRW)

Review of a research study designed to determine the relationship between participation in supervisory training and managerial performance focuses on the importance of adequate evaluation. Dependent and independent variables used are described, statistical analyses are explained, and implications for future research design are presented. (LRW)