ABSTRACT
Prediction, while not the only object of scientific endeavour, is certainly among its most important ones. Without it, no planned human behaviour would be possible. In everyday life, men have to look into the future, trying to assess in advance how their environment and the physical forces on which they depend, how, in particular, their fellow beings are likely to behave in certain circumstances and how they will react to certain changes which may happen at some stage or another. Weather prediction and election polls, being more systematic and better organized and financed than other forms of prediction, have so far been most conspicuous in the public eye, but there have also been well-known prediction studies in the fields of marital adjustment, child development, vocational success and others.
