This paper presents a new multivariate index for use in educational planning. This new index, is called a propinquity index. An individual's propinquity index with respect to a given occupational group is his geometric distance in n-dimensional space from the group centroid, where each dimension is the standard score on one of the original…

The Kuder Richardson-20 Formula is shown to be a special case, where each examinee is given sufficient time to answer each item, of a more general formula where each examinee may not be allowed the necessary time. The formula is extended to allow two scores, knowledge and speed, to be extracted from each examinees test score. Using a sample of 82…