Metaphor comprehension: An individual-differences approach

The nature of the mental processes involved in metaphor comprehension has been the focus of debate, with controversy focusing on the relative role of general analogical reasoning versus language-specific conceptual combination. In the present set of studies, we take an individual-differences approach to examine the comprehension of a variety of metaphors, some taken from literary sources, using several types of comprehension tests. In a series of metaphor-comprehension studies with college students, we measured both fluid intelligence (using the nonverbal Raven’s Progressive Matrices test) and crystalized verbal intelligence (using a new Semantic Similarities Test as well as the Vocabulary subscale of the Wechsler Adult Intelligence Scale). Previous work has shown that measures of fluid intelligence are closely linked to individual differences in analogical reasoning, whereas measures of crystalized verbal intelligence are linked to language-specific abilities. We found that each measure had a dissociable predictive relationship to metaphor comprehension. The pattern of individual differences indicated that crystalized intelligence influences metaphor comprehension across a broad range of metaphor types, whereas individual differences in fluid intelligence mainly impact comprehension of more cognitively complex metaphors, such as those that arise in literary sources.