Cognition and native-language grammar: the organizational role of adjective--noun word order in information representation

In the present research, we investigated the influence of native-language adjective-noun word order on category accessibility for nouns and adjectives by comparing Portuguese speakers (in whose language nouns precede adjectives) with English speakers (in whose language adjectives precede nouns). In two studies, we presented participants with different numbers of verbal or pictorial stimuli, and subsequently they answered questions about noun- and adjective-conditioned frequencies. The results demonstrated a primacy effect of native-language word order. Specifically, although both populations showed a speed advantage for noun-conditioned questions, this tendency was significantly stronger for Portuguese than for American participants. We discuss the important role of native-language syntax rules for the categorization and representation of information.