Leonard S. Cahen

• Class size and instruction
• A comparison of school mean achievement scores with two estimates of the same scores obtained by the item-sampling technique
• Applications and problems in elementary statistics
• Aptitude-treatment interactions
• Comments on Professor Messick's paper entitled "The criterion problem in the evaluation of instruction: assessing possible, not just intended, outcomes"
• Regions of significant criterion differences in aptitude-treatment-interaction research
• The estimation of mean achievement scores for schools by the item - sampling technique
• The prediction of spelling difficulty