Abstract

Though Likert-type scales are frequently employed in research, typically little systematic consideration is given to the process of identifying the number of response categories, selecting appropriate category labels or ensuring that the scale yields an acceptable level of measurement. Relatively little research has been performed to identify the category labels which yield scales with equidistant category points. Unidimensional ratings of category labels associated with the psychological dimensions of intensity, frequency, and similarity on 5-, 7-, and 9-point scales by 192 introductory psychology students yielded several scales with equidistant intervals. Researchers are encouraged to employ such Likert-type scales with interval levels of measurement and to validate them on the population being studied.

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