AN INVESTIGATION WAS MADE TO DETERMINE WHETHER STUDENTS WHO RECEIVED SPECIFIC ASSISTANCE WITH READING SKILLS IN ARITHMETIC SHOWED SUPERIOR ACHIEVEMENT IN THEIR READING AND ARITHMETIC WHEN COMPARED WITH A SIMILAR GROUP WHO DID NOT RECEIVE SUCH ASSISTANCE. FIFTEEN SCHOOLS WERE SELECTED FROM APPROXIMATELY 70 MEMBER SCHOOL DISTRICTS OF THE…

Five distribution-free alternatives to parametric analysis of covariance are presented and demonstrated: Quade's distribution-free test, Puri and Sen's solution, McSweeney and Porter's rank transformation, Burnett and Barr's rank difference scores, and Shirley's general linear model solution. The results of simulation studies regarding Type I…

Some difficulties with field experimental research designs using groups of subjects are discussed. Special attention is given to the problem of interpreting the significant results and how the obtained results can be generalized. Single-subject designs are suggested as suitable alternatives and a few such designs are presented. (Author)

This report compares findings from application data the End of Training surveys administered to Master Teachers (MTs) participating in the Classic version of Intel Teach to the Future and those who took part in the Expansion version of Intel Teach to the Future. Classic survey data were collected between March 2001 and July 2002. Expansion survey…

This working paper contains the overheads used in a seminar designed to introduce some basic concepts of statistics to nonstatisticians. The seminar has been presented on several occasions. The first part of the seminar, and the first set of overheads, deals with the essentials of statistics, including: (1) population, sample, and inference; (2)…

Discusses three weaknesses in reporting research findings by commenting and criticizing research articles published in the eighth volume of Journal of Research in Science Teaching. (CC)

The ideal item in the criterion-referenced testing situation is the item with a nonsignificant discrimination index and a high difficulty level; items that discriminate negatively are clearly unacceptable; and items that discriminate positively usually indicate a need for revision. (Author)

A statistical test is described which determines homogeneity of effect size of an experiment series. An overall fit statistic is partitioned into between-class fit statistic and within-class fit statistic. These statistics permit assessment of differences between effect sizes for different classes and homogeneity of effect size within classes.…

A multitrait-multimethod (MTMM) analysis of alienation employed two personality constructs conceptually relevant to alienation: hostility and locus of control. MTMM analysis indicated that eight of 15 convergent validity coefficients were statistically significant; however, magnitude was small and Campbell-Fiske criteria were not satisfied…

Procedures for computing content validity and consistency reliability coefficients and determining the statistical significance of these coefficients are described. Procedures employing the multinomial probability distribution for small samples and normal curve probability estimates for large samples, can be used where judgments are made on…

A review of previous research has failed to demonstrate that a family life-cycle model is a viable theoretical framework for investigating and understanding patterns of change in marital satisfaction or discord in the American family. (Author)

The validity of an examination of knowledge in the medical sciences was assessed. Scores in clinical medicine categories and total score of the Quarterly Profile Examination were correlated with corresponding scores on the Part II examination of the National Board of Medical Examiners for three different examination dates. (Author/CTM)

In two treatment-repeated measurements designs, the ratio between the unbiased variance of the differences and twice the variance of the errors of measurement can be used to test for interaction of subjects and treatments. The use of this statistic is illustrated. (Author/CP)