Comparison of the combinatorial problem-solving abilities of primary and secondary school pupils with regard to learning effects during an interview

The paper compares combinatorial problem solving behavior of 72 pupils in primary and 72 pupils in lower secondary schools. It concentrates on the results of quantitative evaluations of the learning effects in the process of interview. Differences and correspondences with regard to success of solution, the speed of solution and the choice of strategies are discussed and illustrated with the help of transcripts.