| Sumario: | A study was conducted to investigate the relationship between position of irregularity and plosivity of initial phoneme, using two experiments in which contrasting predictions of the dual-route and parallel distribution processing models of word recognition were tested. In the first experiment, involving a naming task, words irregular at the first phoneme position yielded a greater phonological regularity effect than did words irregular at the second phoneme position. Furthermore, the plosivity of the initial phoneme interacted with regularity. A regularity effect was noted for plosive-initial words, but not nonplosive-initial words, for words irregular at the second phoneme position, but position interacted with regularity regardless of initial-phoneme plosivity. In a lexical decision task in the second experiment, regularity effects were eliminated, which suggests that the naming results were due to the phonological characteristics of the stimuli. The results support the predictions made by Coltheart and Rastle's (1994) dual-route cascaded model and challenge current parallel distributed processing accounts.
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