Lee and colleagues (2000) tested a theory of the role of distinctiveness in face perception. In their study, participants indicated whether they recognized each of 48 faces of male celebrities when they were shown rapidly on a computer screen. A third of the faces were shown in caricature form, in which facial features were electronically modified so that distinctive features were exaggerated; a third were shown in veridical form, in which the faces were not modified at all; and a third were shown in anticaricature form, in which facial features were modified to be slightly more like the average of the celebrities' faces. The average percentage correct across their participants is shown in Figure 5-13. Explain the meaning of the error bars in this figure to a person who understands mean, standard deviation, and variance, but nothing else about statistics.