Recent research proposes that language bias and proficiency modulate cross-language activation in comprehension and production, but it is unclear how they operate and whether they interact. This study investigates whether stress differences between Spanish-English cognates (material, final-syllable stress in Spanish) affect how native-English second-language-Spanish bilinguals recognize Spanish words (materia “subject/matter,” second-syllable stress in Spanish). In a Spanish-English eye-tracking experiment (and parallel production task), participants heard/produced trisyllabic Spanish targets with second-syllable stress (materia) and saw four orthographic words, including the target and a Spanish-English cognate competitor. Cross-language activation was examined by manipulating the stress of the cognate in English. In comprehension, English cognates with the same stress as the Spanish target (materia vs material) were predicted to cause more cross-language interference than English cognates with a different stress (litera “bunk bed,” vs literal), but the reverse pattern was expected in production. Participants were assigned to a Spanish-bias condition (20% of English (filler) items), or an English-bias condition (65% of English (filler) items). Results indicate that English cognates with the same stress as the Spanish target interfered with the recognition of the Spanish target only in the English-bias condition (but facilitated its production), while increasing Spanish proficiency helped reduce this cross-linguistic interference.
