ERIC Number: ED034308
Record Type: RIE
Publication Date: 1968-May
Reference Count: 0
Statistical Report on Indicators of Quality.
Vincent, William S.; Casey, John J.
IAR-Research Bulletin, v8 n3 p1-3 May 68
As a measure of school quality, the instrument Indicators of Quality has met the demands of reliability and item discrimination in a statistical study based on in-class observations in all the school districts in metropolitan New York. In this initial application, the 51 observation items were scored positive, zero, or negative and four aggregate scores were devised. The scores were categorized into elementary, secondary, and district levels. The high and low scores were separated by roughly four standard deviations in the district-wide calculation of each aggregate score. In addition, an intercorrelation of the four scores was run showing no dependence. In general, each item had at least one component, either positive or negative, that discriminated well, and most items had high difficulty levels and high discrimination indices. The reliability of the total instrument was estimated by means of the Spearman Brown formula, which provided a reliability coefficient (r = .91). Related documents are EA 002 619, EA 002 620, EA 002 621, and EA 002 622. (Author/LN)
Publication Type: N/A
Education Level: N/A
Authoring Institution: Columbia Univ., New York, NY. Inst. of Administrative Research.