Re-experiencing the event, avoidance of the trauma-related stimuli, and increased arousal are symptoms of:

Hubel and Wiesel discovered feature detector cells in the visual cortex that respond selectively to

a. spots of light in different locations. b. different colors of stimuli. c. faces. d. lines at different orientations.

The factor that appears to be most strongly related to infants' and toddlers' ability to judge and adjust their own physical abilities in novel settings is

a. their cumulative locomotor experience b. their age c. the variety of surfaces and levels in their home d. the amount of "tummy time" that they had before they began to move on their own