An experiment was conducted to determine the effects of four information-format variables--instructions for processing information, number of documents, masking of information, and interview information--on the teacher selection decision process. It was hypothesized that the variables affect decisions by modifying the consistency of the decisions and/or the certainty of the decision makers. First, descriptive and visual materials were prepared to create a simulated teacher selection situation. Then, 144 school principals from three counties in Washington were selected to work within the situation to make decisions regarding fictitious teacher applicants. Their decisions were measured in terms of consistency, fineness of discriminations, time, and feeling of certainty. A 2x2x3x3 factorial design was used. Results from analysis of variance indicated that the format of information did affect decisions. The optimum format consisted of instructions regarding information processing, a single summary document, no masking of information, and interviews with audiovisual stimuli. (Appended are a 21-item bibliography and materials relative to development of the simulated situation and the subject's responses.) (Author/SG)