Imagery and Mental Practice

S ummary . The vividness and autonomy of imagery of thirty‐two males, aged 18–21 years, was compared with their performance scores obtained at their first attempt to perform a physical skill which they had been mentally practising for six days. First order correlations between vividness of Visual, Kinaesthetic and General Imagery, and the criterion performance scores were insignificant. Autonomy of imagery had a chi square with the criterion which fell marginally short of 5 per cent. significance, but this level was achieved using the Mann‐Whitney U Test. When combinations of autonomy and vividness were compared with criterion scores it appeared that vivid autonomous imagery was associated with low criterion scores in this sample.