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ERIC Number: ED052233
Record Type: Non-Journal
Publication Date: 1971-Feb
Pages: 7
Abstractor: N/A
Reference Count: N/A
A Measure of Scale Clarity.
D'Costa, Ayres G.; And Others
The Feasibility of developing an index to represent the degree of consistency with which a student responds to a set of items in a homogeneous scale is investigated. The dispersion of responses to a set of items by a group of subjects has typically been measured by the standard deviation. Here, the interest is in the dispersion of responses from the same subject to a set of items. The Ohio Vocational Interest Survey was used to gather students' responses to 11 items (job-activity statements) in terms of a 5-option scale. The investigation consisted of 3 phases: (1) a scale clarity index (SCI) was devised; (2) all possible response patterns were defined and the clarity of each was rated in terms of degree of consistency; and (3) the extent to which the deviation raw score, the standard deviation, mean deviation, and a centrality index would predict the scale clarity rating developed in the second phase was investigated. A critical aspect of this study is the judges' ratings of the clarity inherent in each pattern. The SCI provides additional information as to the nature of a subject's responses, is useful in the interpretation of raw scores, especially those based on individual item responses, and has great promise in testing and measurement practice. (TA)
Publication Type: N/A
Education Level: N/A
Audience: N/A
Language: N/A
Sponsor: N/A
Authoring Institution: N/A