A historical perspective is provided of the concept of invariance in measurement theory, describing sample-invariant item calibration and item-invariant measurement of individuals. Invariance as a key measurement concept is illustrated through the measurement theories of E. L. Thorndike, L. L. Thurstone, and G. Rasch. (SLD)

The career of Stuart Appleton Courtis in the growth of testing and educational measurement parallels the development of progressive education in the first half of the twentieth century. In 1909 he developed the standardized Courtis Arithmetic Test, Series A, the first objective test used in any city public schools. Continuing his work in testing,…

A psychometrician and acquaintance of Carl C. Brigham, the "father of the Scholastic Aptitude Test," comments on the man's presonality traits and the culture that shaped his thinking. Areas of testing research that should be pursued are suggested. (MSE)

Describes development of qualifying examinations in English and Welsh secondary schools. Evaluates forms and quality of testing in history. Presents suggestions by experts and changes made in England and Wales over 21-year period. Finds that most problems stemmed from desires to cover long periods of time while providing the depth of coverage…