Figure 1From: Effects of environmental and physiological covariates on sex differences in unconditioned and conditioned anxiety and fear in a large sample of genetically heterogeneous (N/Nih-HS) ratsBetween-sex differences in unconditioned anxious behaviour in the ZM test as a function of "batch" and "season". For each sex and batch there was a minimum n = 85 rats. Across batches, females were n = 85-144 and males were n = 106-140. *, p < 0.05; **, p < 0.01; **, p < 0.001, between sexes within the same batch (Student's t-tests for independent groups following significant factorial ANOVAs).Back to article page