Question: Maureen O'Sullivan (2007) stated that research on expert lie detection is based on three assumptions: 1) Lie detection is an ability that can be measured;

Maureen O'Sullivan (2007) stated that research on expert lie detection is "based on three assumptions: 1) Lie detection is an ability that can be measured; 2) This ability is distributed like many other abilities (i.e., normally); 3) Therefore, only a very few people will be highly accurate" (p. 118). How does this researcher know that very few people will be highly accurate at lie detection?

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