A common problem with standard five-point frequency rating scales is their inability to differentiate between objects within a relatively narrow band of the rating dimension. Two alternatives for increasing a scale's ability to reflect existing differences are: increasing the number of positions on the rating scale, or packing the rating scale with… (More)
Examined two assumptions about the dimensionality of Rotter's I-E scale: First, the bipolarity of the two statements within each item pair; second, the unidimensionality of the overall construct. A revised I-E scale was constructed in which each of the statements from the original I-E scale was presented separately and the 367 subjects could accept or… (More)
The purpose of this study was to develop and compare tests of independent groups' slopes for non-normal distributions and heteroscedastic variances, including slope tests based on least squares, Theil-Sen, and trimmed estimation approaches. A slope test based on jackknife standard error estimates is proposed that can utilize each of the traditional… (More)
Locus of control has emerged as an important outcome variable in many health education programs. This study evaluated one instrument designed to measure this construct. Responses to the Parcel-Meyer Children's Health Locus of Control Scale from two groups of sixth grade students were collected to consider fit of the items to the underlying theoretical model… (More)
The AAIS and data by Mayer and Filstead to support it are critically analyzed. The lack of common variance among items is believed to be due to poorly constructed and unordered response options to many items. The primary recommendation is not to use the scale until it is revised to ensure that individual items as well as the scale produce meaningful results.