Roosters, robins, and alarm clocks: Aptness and conventionality in metaphor comprehension

Bowdle and Gentner (2005) proposed a reconciliation of the comparison and categorization models of metaphor comprehension. Their career of metaphor model posits that, as a metaphorical term becomes more conventional, its mode of processing shifts from comparison to categorization. However, other recent studies (Chiappe et al., 2003 and Jones and Estes, 2005) suggest instead that aptness may mediate metaphorical processing. We empirically contrasted conventionality and aptness to examine their roles in metaphor comprehension. Aptness predicted the preference for metaphors over similes (Experiment 1), the speed and ease of metaphor comprehension (Experiment 2), and the category membership of metaphorical terms (Experiment 3). Conventionality did not reliably predict any of these aspects of metaphorical processing. Thus, results supported the categorization model, and failed to support the career of metaphor.