1. & Experimental and quasiexperimental designs for research. Chicago: Rand McNally, 1963.
2. Analysis of Covariance: Its Nature and Uses
3. & Children's inductive reasoning performance on picture stimuli. Chicago: American Educational Research Association, 1972. (ERIC Document Re-production production Service No. ED 063–018.)
4. & Acquiring cognitive structure by discovery and rule earning. Ann Arbor, Mich.: Michigan University, 1970. (ERIC Document Reproduction Service No. ED 062–667.)
5. Field dependence and the closure factors. Unpublished manuscript, 1960.