“…This tendency may account for the variability of responses that was found to be characteristic of extroverts. Extroverts have low perceptual rigidity (Canestrari, 1957), low rigidity in thinking (Eysenck & Eysenck, 1962;Watson, 1967;White, 1968), high intrapersonal variability (Eysenck, 1947), high variation in sexual partners (Wilson & Nias, 1975), high variety-seeking on monotonous tasks (Hill, 1975), low persistence (Payne, 1973, p. 472), high alternation behavior (Eysenck, 1967), more fluctuations of reversible figures, and more changes in choice-of-viewing situations (Wilson, 1978). Further, exviants were found to have larger variability in simple reaction times, less persistence, and more "cognitive plasticity" (Hundleby et al, 1965, p. 301, Items 263 and 402, p. 295).…”