Some Determinants of the Difficulty of Non-Verbal Classification Items

Bartlett, F. C. Thinking—An Experimental and Social Study. London: George Allen and Unwin Ltd., 1958.

Burt, C. "Test Construction and the Scaling of Items." British Journal of Psychology, Statistical Section , IV (1951), 95-129.

Burt, C. "The Theory of Mental Testing." The Yearbook of Education, (1950), 42-73.

Cattell, R. B. "A Culture-Free Intelligence Test. II." Journal of Educational Psychology, XXXII (1951), 81-100.

Cattell, R. B. "The Measurement of Adult Intelligence ." Psychological Bulletin, XL (1943), 153-93.

Corter, H. M. "Factorial Analysis of some Reasoning Tests." Psychological Monograph, LXVI (1952), Whole No. 340.

Dressel, P. L. "The Development of a Test of Uniqueness." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT , XVII (1957), 43-54.

Ebel, R. L. "Writing the Test Item." In E. F. Lindquist , (Editor), Educational Measurement. Washington: American Council on Education, 1951, 185-249.

English, H. B. "An Experimental Study of Certain Initial Phases of Abstraction." American Journal of Psychology , XXXIII (1922), 305-50.

Goodenough, F. L. Mental Testing. New York: Rinehart and Company, 1949.

Green, R. F. , Guilford, J. P. , Christensen, P. R. and Comrey, A. L. "A Factor-analytic Study of Reasoning Abilities." Psychometrika, XVIII (1953), 135-60.

Guilford, J. P. Psychometric Methods. New York: McGraw-Hill Book Company, 1954.

Hamid, S. A. "Some Factors of Effectiveness in Mental ('Intelligence') Tests." British Journal of Psychology , XVI (1925), 100-15.

Hawkes, H. E. , Lindquist, E. F. , and Mann, C. R. The Construction and Use of Achievement Examinations. Boston: Houghton Miflin Company, 1936.

Hearnshaw, L. S. "Recent Studies in the Psychology of Thinking." Advancement o f Science, XI (1954-1955), 220-31.

Hebb, D. O. "Verbal Test Material Independent of Special Vocabulary Difficulty." Journal of Educational Psychology, XXXIII (1942), 691-99.

Heim, A. W. "Adaptation to Level of Difficulty in Intelligence Testing." British Journal of Psychology, XLVI (1955), 211-24.

Heim, A. W. "An Attempt to Test High-Grade Intelligence." British Journal of Psychology, XXXVII (1946-1947), 70-81.

Heim, A. W. The Appraisal of Intelligence . London: Methuen and Company, Ltd. , 1954.

Hoffman, H. N. "A Study in an Aspect of Concept Formation with Subnormal, Average and Superior Adolescents." Genetic Psychology Monographs, LII ( 1955), 191-239.

Humphrey, G. Thinking: An Introduction to its Experimental Psychology. London: Methuen and Company, Ltd., 1951.

Menger, K. "On the Design of Grouping Problems and Related Intelligence Tests." Journal of Educational Psychology , XLIV (1953), 275-87.

Ross, J. The Difficulty of Multiple Choice Items. Unpublished B.A. Thesis, University of Sydney, 1954.

Scates, P. E. "Complexity of Test Items as a Factor in the Validity of Measurement." Journal of Educational Research, XXX (1936- 1937), 77-92.

Siegel, S. Nonparametric Statistics for the Behavioural Sciences. New York: McGraw-Hill Book Company, 1956.

Spearman, C. The Abilities of Man. London: Macmillan and Company, Ltd., 1927.

Spearman, C. The Nature of Intelligence and the Principles of Cognition. London: Macmillan and Company, Ltd., 1923.

Stoddard, G. D. The Meaning of Intelligence . New York: The Macmillan Company , 1943.