Cues to lexical stress assignment in reading Italian: A megastudy with polysyllabic nonwords

When reading polysyllabic words, assignment of lexical stress is a challenge for readers, especially in languages, such as English or Italian, in which stress position is not strictly determined even though words as well as nonwords typically contain several sublexical cues to stress that readers might use. Here, we attempted to identify such cues using a corpus analysis and to examine their impact on human performance in a megastudy in which participants (N = 45) assigned stress to nonwords (N = 800), stimuli particularly revealing of stress cue use because they have no predefined stress pattern. Hierarchical regression results confirmed an impact of sublexical cues examined in former studies and revealed a role for cues not previously examined, including similarity to real words. These results are informative for computational models of reading as they indicate that readers assign stress to nonwords based on not only sublexical but also lexical information.