By pairing the ringing of a bell with the presentation of meat, Pavlov trained dogs to salivate to the sound of a bell even when no meat was presented. In this experiment, the presentation of the meat was the:

Visual expansion and motion parallax are called kinetic cues because they both involve _______________ to help one estimate depth

Fill in the blank(s) with correct word

Difficulty in managing ADLs increases markedly after age 85 . Which of the following is a leading factor in postindustrial countries?

a. Biological changes b. Malnutrition c. A sedentary lifestyle d. Diseases