A star golfer misses a critical putt; a brilliant student fails to ace a test; a savvy salesperson blows a key presentation. Each of these people has suffered the same bump in mental processing: They have just choked under pressure.

It’s tempting to dismiss such failures as “just nerves.” But to University of Chicago psychologist Sian Beilock, they are preventable results of information logjams in the brain. By studying how the brain works when we are doing our best — and when we choke — Beilock has formulated practical ideas about how to overcome performance lapses at critical moments.

Beilock’s research is the basis of her new book, Choke: What …