Although single case studies might be useful to evaluators for a variety of purposes, there are no generally accepted ways for drawing inferences about the generality of findings from a case study. Single case studies are defined in this paper as either studies of single events, or disaggregated studies of multiple events. The data may be…

The content analysis of television has always been associated with unique procedural problems because television programming must be successfully captured and sampled before analysis can begin; some of the problems and recent advances in this area are reviewed, i.e., sampling, measurement, and the videotape equipment used in coding. An extensive…

A solution is proposed for analysis of variance procedures with missing cells, such as may occur when a control group is not assigned to any of the rows or columns of the various experimental groups. Mathematical models for two-way design are presented which define several variables; as well as row effect, column effect, and row and column…

Two population raw data matrices were constructed by computer simulation techniques. Each consisted of 10,000 subjects and 12 variables, and each was constructed according to an underlying factorial model consisting of four major common factors, eight minor common factors, and 12 unique factors. The computer simulation techniques were employed to…

This paper addresses four issues in the design and execution of behavioral observation in classrooms. These four issues relate to the consequences of using different observation intervals, schedules of observation, student sampling methods, and definitions of on-task and off-task behavior for reliability, means, and correlations of time on-task…

Factor analyses of the Wechsler Preschool and Primary Scale of Intelligence (WPPSI) was conducted. The random sample included 100 boys and 100 girls beginning at age four with increments of 6 months up to age 6 1/2. The intercorrelation matrix of the 11 WPPSI subtests at each of the age levels was factor analyzed, and the percent of common,…

This report is one of five submitted as products of a "Study Designed to Assist Planning of Research on Significant Instructional Features in Bilingual Education Programs." The reports are intended to assist the National Institute of Education (NIE) in its plans for a major new research study in bilingual education. The present report is…

A Monte Carlo study was conducted to estimate the efficiency of and the relationship between five equations and the use of cross validation as methods for estimating shrinkage in multiple correlations. Two of the methods were intended to estimate shrinkage to population values and the other methods were intended to estimate shrinkage from sample…

Identified are systematic visitor observation techniques to provide data to show visitors' reactions to interpretive programming. Use of this data should enhance the ability of the interpretive naturalists to plan, conduct, and evaluate interpretive programming. The suggested techniques can be accomplished without outside help, and can be…

This is one of three volumes presenting the procedures and results of a research effort investigating the effects upon student outcomes of training teachers to implement individual study and self-directed study in their classrooms. In this volume correlation matrices drawn from tests of student variables and achievement are presented. Item…

Methods for ordering and selecting variables for discriminant analysis in multiple group comparison or group prediction studies include: univariate Fs, stepwise analysis, learning discriminant function (LDF) variable correlations, communalities, LDF standardized coefficients, and weighted standardized coefficients. Five indices based on distance,…

Stability of Type I error rates and power are investigated for three forms of the Box test and two forms of the jackknife test with equal and unequal sample sizes under conditions of normality and nonnormality. The Box test is shown to be robust to violations of the assumption of normality when sampling is from leptokurtic populations. The…

Study of college faculty has been hampered by the variation in types of institutions, the difficulty of obtaining an accurate faculty sample, and poor response rates to large-scale surveys. This document examines various approaches to conducting large-scale faculty surveys, and describes a suggested procedure to mitigate methodological problems.…

This report contains the results of the first statewide educational learner pilot assessment in Wisconsin. The objectives of the program were: (1) to develop and refine the statewide assessment process including instrument development, instrument administration, analysis, interpretation, and dissemination of the results; (2) to provide a…

The present study evaluated methods by which speech samples for equal appearing interval scaling of articulation defectiveness could be prepared with a minimum time expenditure. Ten public school speech therapists rated 40 one minute edited and 40 unedited speech samples on a nine point equal-appearing interval scale. The speech samples were…