Figure 5.

Male olfactory discrimination performance. Total number of correct and incorrect responses made by air control and PQ-exposed males (n = 8–9/group) in a 2-choice olfactory discrimination test at (A) 100:0 ratio of positive: negative scents in the correct choice (least difficult), (B) 90:10, (C) 80:20, and (D) 70:30 (most difficult). As there was a possibility that a mouse with impaired olfaction could guess correctly in a 2-option test, the residual (%) of mice within each group that never made an error was also visualized to further highlight the differences between treatment groups (E). All mice were able to correctly identify single scents during training. Olfactory discrimination training/testing began 135 days after the end of exposure. *, significant main effect of PQ at p ≤ .05 following Chi square analysis. Abbreviation: PQ, paraquat.