Marascuilo and Levin's (1970) notion of Type IV errors is extended, with respect to the interpretation of interactions in analysis of variance (ANOVA) designs. To help clarity what an interaction is and what it is not, in terms of the ANOVA model, the following points are made: (i) interactions should be thought of as linear contrasts involving…

The agreement between visual analysis and the results of the split-middle method of trend estimation was examined using a set of 24 stimulus graphs and 30 raters. Results revealed poor agreement between the two methods, and low sensitivity, specificity, and predictive ability for visual analysis in relation to statistical inferences. (JDD)

Two analytic models, each with different implications for data analysis, have been used in behavioral science research for assessing attitudinal congruency. The term relative congruence applies to the family of agreement indices which, although functions of the absolute index, are formulated relative to chance expectations. The term absolute…

THE TOPICS OF EIGHT CONFERENCE PAPERS INCLUDE (1) THE PROBLEM OF DIFFERENTIATING EFFECTS OF SPECIFIC INSTRUCTION FROM EFFECTS OF OTHER INFLUENCES (GROWTH, ENVIRONMENT, AND SELF-INSTRUCTION), (2) CRITERIA FOR MEASURING CHANGE IN PROFICIENCY, AND (3) WAYS OF RELATING SUCH CHANGE TO OUTSIDE VARIABLES SUCH AS MEASURABLE CHARACTERISTICS OF LEARNERS AND…

The use of various physiological tests and measurements accurately predicts the performance ratings of female athletes. A study involving 180 female intercollegiate volleyball players, 142 female intercollegiate basketball players, and 115 female college-age nonathletes yielded a set of statistical differentials concerning arm length, lean weight…

Differential achievement growth patterns between comparison groups is a problem associated with data analysis in compensatory education programs. Children in greatest need of additional assistance, are usually assigned to the program rather than to an alternative treatment so that the comparison groups may vary in several ways, in addition to the…

The extent of error likely to occur with each of several approximations for the standard deviation, internal consistency reliability, and the standard error of measurement is analyzed. Approximations were compared with exact statistics obtained on 85 different classroom tests constructed and administered by professors in a variety of fields. Means…

Over a two-year period this study examined the relationship of two levels of supervision with both the job performance and weekly earnings of the hard-core unemployed (HCU). First- and second-level supervisors were measured on consideration, initiating structure, and social insight. After six months on the job the HCU's perceptions of their…

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…

A methodological framework is presented for representing tradeoffs among alternative combinations of training and aiding for personnel in complex situations. In general, more highly trained people need less aid, and those with less training need more aid. Balancing training and aiding to accomplish the objectives of the system in a cost effective…

The two studies reported examined the validity of several Evaluation/Survey Service (ESS) surveys for accurately reflecting changes in students' perceptions resulting from changes made by an institution in its policies, programs, services, or environment. In study 1, personnel from nine postsecondary institutions identified items on various ESS…

DATA FROM THE PARAGRAPH ORGANIZATION PORTION OF THE CEEB ENGLISH COMPOSITION TEST (ECT) WERE CONVERTED TO THE ORIGINAL RANK-ORDER AND WERE THEN RESCORED BY THREE SYSTEMS USING SPEARMAN'S RHO TO DETERMINE WHICH METHOD YIELDED SCORES THAT CORRELATED BEST WITH TOTAL ESSAY SCORES. TWO OF THE METHODS INVESTIGATED, ONE IN WHICH THE NUMBER OF SCORES WAS…

A "Research Conference on the Use of Autobiographical Data as Psychological Predictors" brought together 15 research psychologists to discuss means of maximizing the use of autobiographical instruments. The purposes of the conference were to: (1) reveal experiences, statistical data, and psychological insights developed through research and the…

Methods of defining and projecting a concept of consumer unit appropriate for analyses of changes in the tax-transfer system are presented. The population of persons covered by the March supplements to the Current Population Surveys is organized into simulated tax and transfer system (STATS) units and results are shown for several years. The…

The impact of the tax-transfer system on the distribution of income among economic units is the subject of a number of studies by the Office of Research and Statistics of the Social Security Administration. One of the most important data sources for the work is the Census Bureau's March Current Population Survey (CPS). To conduct such studies, the…