Overall performance
Answers (female vs. male voice) to all items were used to calculate average gender consistency ratings for M/F animals and items separately, for M/F nouns, and a total consistency index for all nouns. The consistency ratings could have any value between 0 (always inconsistent with grammatical gender) and 1 (always consistent with gender). These ratings were compared to random chance of 0.5 using one-sample t-tests.