EXPERTS AND NOVICES ERROR PATTERNS IN SOLVING PART-WHOLE MATHEMATICALWORD-PROBLEMS

The role of dynamic assessment involving two instructional strategies, a specific and a general instructional strategy, on experts' and novi ces) error patterns in solving part-whole addition and subtraction wor d problems was examined, Experts in the specific strategy group (SSG) showed a decrease in errors from the pretest to transfer posttests and maintained the low frequency of errors on the delayed posttest, In ad dition, the two strategies differentially influenced the kinds of erro rs made by experts on the posttests following dynamic assessment, Howe ver, error patterns of novices in the two groups did not show a specif ic trend of decrease in the number and kind of errors.