Extra cognitive loads can hinder challenging self-presentations by usurping needed cognitive resources but also may sometimes improve them by shifting attention away from negative self-preoccupation. In Study 1, extraverts and introverts participated in an interview in which they presented themselves as either extraverted or introverted. Congruent self-presentations, which should be cognitively nondemanding, were unaffected by a cognitive busyness manipulation (rehearsing an 8-digit number). However, incongruent self-presentations were affected by busyness. Busyness decreased the effectiveness of extraverts who tried to appear introverted but increased the effectiveness of introverts who tried to appear extraverted. Study 2 found that introverts, who also tend to be socially anxious, reported less public self-consciousness and fewer negative self-focused thoughts when they were busy than when they were not busy.
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Pontari et al. (2000) studied this question.
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