Figure 2.
Age and sex classes and the duration of inter-blink interval (IBI) and blink duration (BD) periods. (A) Young males showed longer inter-blink interval than those of other three classes. (B) There was no difference in blinking duration between four age-sex classes. Thick horizontal lines show the medians, boxes show the inter-quartile range (IQR), and whiskers show 1.5 times the IQR. Abbreviations: Y♂, Young male; A ♂, Adult male; Y♀, Young female; A♀, Adult female. *p < 0.05 and **p < 0.01, tested by lsmeans using “lsemans” package.