The cue utilization and hypothesis testing strategies of expert reading diagnosticians were examined throughout the diagnostic process. Diagnostic processes of three diagnosticians (a reading specialist, a learning disabilities specialist, and a classroom teacher), who were very different in background and teaching assignment, were studied at work…

This experiment was designed to investigate the possibility that young children use syntax to constrain and focus verb meanings in their interpretations of novel scenes and novel verbs. Subjects were 24 children, 12 males and 12 females, of 23 to 27 months, all raised in English-speaking homes. Their mean productive vocabulary was 240 words. A…

The probability of experiment-wise error is explored. Overall, the experiment-wise error rate is directly related to the test-wise error rate--the alpha level set by researchers to curtail the existence of a Type I error. A Type I error occurs when a true null hypothesis is rejected in a given study or experiment. The experiment-wise error rate is…

Meta-analyses of the hypotheses that relationships exist between play and problem solving, and between play and creativity, were conducted. The data set for the meta-analyses included studies designed to investigate the relationship between play and fluency or originality, or between play and problem-solving behavior. The meta-analyses of…

This study tested the hypothesis that measured aptitudes and self-ratings of these same aptitudes reflect a common domain of psychometric behavior. Male and female applicants for vocational guidance completed a self-rating scale and then the General Aptitude Test Battery (GATB). The self-rating scale contained six vocational/educational aptitudes.…

The position of the "purists" who insist on limiting data to ordinal analysis is contrasted with the "pragmatists" who treat data as interval. (Author)

Relationships between educators' innovation-adoption behavior and five attributes of innovation (relative advantage, compatibility, complexity, trialability, observability) were examined. The attributes, developed by Rogers and Shoemaker, emerged from research in disciplines such as sociology and anthropology, and the present investigation was…

Four different extensions to McNemar's problem concerning the hypothesis of equal probabilities for the unlike pairs of correlated binary variables are considered, each for testing simultaneous equality of proportions of unlike pairs in c independent populations of correlated binary variables, but each under different assumptions and/or additional…

A method of applying the discriminant function to correlated samples was discussed for the researcher interested in utilizing multivariate statistics to pre-post data. By finding the linear combination that maximizes differences in the groups, the t-statistic can be computed for correlated samples. (Author)

Supported by research grants MH-07003 and MH-11521 from the National Institute of Mental Health, U.S. Public Health Service.

PRE-EXISTING ASSOCIATION BETWEEN WORDS WAS HYPOTHESIZED TO BE A VARIABLE INFLUENCING CHOICE OF WORDS DURING THE PROCESS OF SENTENCE CONSTRUCTION. IN THE FIRST EXPERIMENT, 32 SS (SUBJECTS) ENGAGED IN A PACED-RECALL TASK. MATERIALS WERE SETS OF THREE SENTENCES WHICH VARIED ONLY IN TWO NON-ASSOCIATED EMBEDDED ADJECTIVES WHICH COULD BE INTERCHANGED…

The power of a statistical test is, in part, a function of the reliability of the dependable variable being analyzed. The substitution of sigma square divided by the reliability coefficient for sigma is proposed. This enables the researcher to incorporate dependent variable reliability information when determining the sample size required for a…

Two well known directional (one-tailed) tests of significance, mean difference and correlation coefficient, are presented within the multiple linear regression framework. Adjustments on the computed probability level are indicated. The case for a directional interaction research hypothesis is defended. Conservative adjustments on the computed…