Abstract
Summary Thirty six four‐year‐old children were given the Raven's Coloured Progressive Matrices and were then randomly divided within sexes into two groups. A treatment group worked through sixteen computer presented problem‐solving activities while the second was a controlled group and did not do the activities. All the children were then re‐tested on Raven's Matrices. The results showed a significantly greater improvement between the pre‐ and post‐test for the treatment group than for the control group. The results are discussed in terms of the development of thinking skills.