scored: (1) locomotion – the number of sections crossed and the distance and average speed traveled; (2) long calls – the
frequency of long phee contact calls; (3) exploration – the frequency of leg-stands (to raise the body into a bipedal position) and smelling/licking the apparatus; (4) Glance – the frequency of a rapid upward or downward movement of the head directed at the environment, while stationary; and (5) Scan – the frequency and duration of continuous long-lasting (>5 s) sweeping upward or downward movements of the head directed at the environment, while stationary.