Psychologist Alexander Todorov may well be on to something in how people read faces across the sexes, but the male and female images displayed in “First Impressions” (Life of the Mind, July 8) look more than just male and female. The female image has its lips turned up in a smile, eyes wide, whereas the male image seems to be frowning, its eyes narrowed ­— or is that supposed to be part of typical male-female differences?

David Galef ’81