This study examines the various abilities subsumed under the process of correlational thinking. Each major ability is translated into behavioral activities and procedures in six booklets. Each booklet corresponds to a specific major ability and is placed, with respect to the other booklets, in a highly structured sequence. The specific abilities are Logical Class Formation, Logical Class Manipulation, Logical Class Negation, and Correlation Formation. At the end of this structured sequence the individual will be able to perform correlational analysis by making a statement of relationship when presented with event frequencies of variable combinations in random order or in two by two matrix. A three factor fixed effects, sex(2) X grade level(3) X IQ level(3), multivariate analysis of covariance model was applied using a total N = 365 students from the fifth, seventh and ninth grades. Covariates were age, probability pretest scores, and six pretest sequence scores. The dependent variables consisted of total scores on each programmed booklet and six posttest sequence scores. An F test value indicated that the program had significant effect, and beyond the first covariate, age, all other covariates proved to be significant. (Author/PR)