Excitement, fatigue, and anxiety can all be detected from someone’s blinks, according to psychologist John Stern at Washington University in St. Louis. Stern (36) in the study on these tiny twitches, using them as sensitive (37) of how the brain works. "I use blinks as a psychological measure to make (38) about thinking because I have very little (39) in what you tell me about what you are thinking." He says. "If I ask you the question, ’what does the phrase a rolling stone gathers no moss mean’ you can’t tell me (40) you’ve started looking for the answer. But I can, by watching your eyes. " Blinks also tell Stern when you have understood his question—often long before he’s finished asking it and when you’ve found an answer. "We blink at (41) that are psychologically important." He says. "You have listened to a question, you understand it, now you can take time out for a blink. Blinks are (42) marks. Their timing is tied to what is going on in your head." Stern has found that subjects suppress blinks anticipating (43) but not when they’re reciting it. "You don’t blink," he says, "until you have (44) the information to some short-term memory store." The more important the information that people are taking in, the more (45) they are to put their blinks on hold for themselves. A. pursuits B. doubt C. likely D. punctuation E. when F. specialized G. committed H. inferences I. probes J. times K. absorbed L. faith M. evaluation N. how O. information