The questionnaire included the nine statements shown, presented in a random order. Statements describing the predicted phenomena are underlined. Subjects indicated their response on a seven-step visual-analogue scale ranging from ‘agree strongly’ (+++) to ‘disagree strongly’ (---). Points indicate mean responses. Bars indicate response range. The questions underlined showed a statistically significant tendency to evoke affirmative responses (P <0.002 for underlined questions, P <0.018 after correcting for multiple comparisons).