Study shows power of mind over memory

The memory-blocking process extends beyond traumatic events to the management of common daily experiences, as well, Anderson said.

"For example, maybe you see a note that reminds you of an upcoming meeting with an unpleasant person," he said. "And you just say 'I don't want to think about that right now,' and focus on the work at hand. So you push it out of your mind and wind up forgetting about the meeting.