Fundamental problems in the collection and use of data, in particular the need to develop and use criteria for data, are discussed. Specific examples of the use and misuse of data related to teachers and children in the public schools are presented. Two methods of data collection--manifest techniques and formal response instruments--are evaluated…

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…

The Personnelman (PN) Rating was the subject of a recent study in which selection test scores were found to correlate satisfactorily with school grades. The purpose of this followup study was to determine whether correlations exist between selection test scores and job performance measures, and whether the experimental tests taken by PN students…

A total of 168 Negro and 296 white Medical Technicians participated in this study. A nine-scale performance rating form was developed and administered. Every technician was rated by at least two supervisors. A test of job knowledge was also given to all subjects. Among the correlations found were: (1) Negro workers received distinctly higher…