One of a series of reports on the International Project for the Evaluation of Educational Achievement (in Mathematics).

This paper presents in detail a proof of the limits of the sample bivariate correlation coefficient which requires only knowledge of algebra. Notation and basic formulas of standard (z) scores, bivariate correlation formulas in unstandardized and standardized form, and algebraic inequalities are reviewed first, since they are necessary for…

Two additional studies in long-term sentence memory were conducted to determine if certain critical relationships predicted by a cognitive model of test anxiety could be strengthened. Using the same sentence materials combined with different procedures, reliable test anxiety - memory relationships were generated by not constraining the initial…

This correlational study was part of an experimental project study on abused and non-abused children between the ages of two months and six years. Thirty-one children were administered the Bayley Scales of Infant Development (BSID) and the McCarthy Scales of Children's Abilities (MSCA). To determine the extent of MSCA and BSID relationship,…

Common applications of the part correlation coefficient are in causal regression models and estimation of suppressor variable effects. However, there is no statistical test of the significance of the difference between a zero-order correlation and a part correlation, nor between a pair of part correlations. Hotelling's t is used for contrasting:…

A major deficiency in classical test theory is the reliance on Pearson product-moment (PPM) correlation concepts in the definition of reliability. PPM measures are totally insensitive to first moment differences in tests which leads to the dubious assumption of essential tan-equivalence. Robinson proposed a measure of agreement that is sensitive…

The average Graduate Record Examinations (GRE) Aptitude Test scores of test-takers who had their scores sent to 57 history and 60 chemistry departments in 1972-73 ("scores senders") are compared with the average Aptitude Test scores of first-year students who enrolled in these departments in the fall of 1973 ("enrolled…

The relationship between Piagetian and school achievement tests was examined through a meta-analysis of correlational data between tests in these domains. Highlighted is the extent to which performance on Piagetian tasks was related to achievement in these areas. The average age for the subjects used in the analysis was 88 months, the average IQ…

A Monte Carlo study was conducted to discover the amount of bias to be expected in canonical correlations and in the canonical redundancy statistic. Six hundred random sample replications of 72 conditions were performed and the mean sample values compared with population values. Conditions were varied with respect to the number of predictor…

If the factor loadings of a core set of variables (fitting the general factor model) are the same when analyzed alone, and when analyzed along with the rest of the variables in an infinite behavior domain, there is only one factor variable in the domain that is a possible factor variable of the core set. If the condition of consistency of factor…

As a means of studying the present public catalogs and possible catalog format alternatives at the Iowa State University library, a 6-week queuing study was conducted. Objectives of the study were (1) to determine the correlation between other library statistics (e.g., door counts and circulation records) and use of the public catalogs; (2) to…

THE CHARACTERISTICS OF COLLEGE FRESHMEN IN NEED OF, AND RECEPTIVE TO, COUNSELING WAS STUDIED WITH THE STRUCTURED-OBJECTIVE RORSCHACH TEST (SORT) TO--(1) MODIFY THE SORT, (2) CLASSIFY SUBJECTS INTO COUNSELING AND NON-COUNSELING GROUPS, (3) DETERMINE IF THE SORT COULD DIFFERENTIATE BETWEEN COUNSELING AND NON-COUNSELING SUBJECTS, AND (4) CONSTRUCT…

CONTENTS--(1) AN ASSOCIATIVITY TECHNIQUE FOR AUTOMATICALLY OPTIMIZING RETRIEVAL RESULTS BY RONALD R. ANDERSON. AN ASSOCIATIVE TECHNIQUE BY WHICH IT IS POSSIBLE TO AUTOMATICALLY EXPAND AND NARROW THE NUMBER OF DOCUMENTS RETRIEVED AND TO RETRIEVE DOCUMENTS RELATED TO A REQUEST EVEN THOUGH THEY MAY NOT BE INDEXED BY THE EXACT TERMS OF THE REQUEST IS…

ONE OF THE PROBLEMS IN INFORMATION STORAGE AND RETRIEVAL SYSTEMS OF TECHNICAL DOCUMENTS IS THE INTERPRETATION OF WORDS USED TO INDEX DOCUMENTS. SEMANTIC TOOLS, DEFINED AS CHANNELS FOR THE COMMUNICATION OF WORD MEANINGS BETWEEN TECHNICAL EXPERTS, DOCUMENT INDEXERS, AND SEARCHERS, PROVIDE ONE METHOD OF DEALING WITH THE PROBLEM OF MULTIPLE…

THE RELATIONSHIP BETWEEN THE COUNSELOR'S PERCEPTION OF STUDENTS AND CERTAIN CHARACTERISTICS OF THE COUNSELOR'S TRAINING, BACKGROUND, AND PRESENT ENVIRONMENT WAS STUDIED. THE SUBJECTS WERE 42 COUNSELORS, SELECTED AT RANDOM, REPRESENTING A CROSS-SECTION OF FULL AND PART-TIME COUNSELORS IN ALABAMA HIGH SCHOOLS. AN 84 ITEM IDEAL STUDENT Q-SORT,…