Bonnet, C.&Kolehmainen, K. Prediction of the future position of a moving object.Scand. J. Psychol., 1969,10, 6570.—Hypothesis: prediction of the reappearence of a moving object involves some kind of estimation of space, velocity, and time. Results: the performance depends on the relative ease of utilisation of those cues when all are available in the situation. Conclusion: no general rule can be applied to all situations, because different strategies are used in different situations. The parameter which carries most weight in any given situation is determined by the ease with which the relevant information can be extracted from that parameter, relative to the other tw