Unexpectedness article 2 human 2 Attention 1 Blood pressure 1 Body sway 1 Control 1 Explanation 1 Freezing 1 Heart rate 1 Humans 1 Negativity bias 1 Orienting 1 Physiology 1 Surprise 1 Temperature 1 adult 1 attention 1 blood pressure monitoring 1 body equilibrium 1 body movement 1 cognition 1 controlled study 1 decision making 1 expectation 1 female 1 finger 1 freezing 1 heart rate 1 human experiment 1