Armadillos curl up into a ball when attacked. Reginald teaches an armadillo to curl up into a ball when a buzzer sounds. Reginald is making use of the phenomenon known as _________

What are the components of the brain stem?

a) forebrain and midbrain b) hindbrain and midbrain c) forebrain and hindbrain d) forebrain, hindbrain, and midbrain

What type of study would you use if you were interested in how the auditory ability of 5-, 10-, 15-, and 20-year-old people changes over a 10-year period?

a) longitudinal b) cross-sectional c) sequential d) experimental