Susan is watching a football game when the game goes to commercial. she knows that each commercial break during the game takes a different amount of time to resolve. she gets up to make a snack for herself. she checks back frequently to see if the game is back from commercial. after 3 minutes and 30 seconds, the game comes back on and susan returns to the room. which of the following statements is true? a. susan is on a fixed-interval schedule of reinforcement. b. susan is on a variable-interval schedule of reinforcement. c. susan is on a fixed-ratio schedule of reinforcement. d. susan is on a variable-ratio schedule of reinforcement.

The right option is; B. Susan is on a variable-interval schedule of reinforcement.

A variable interval schedule of reinforcement is the one that involves the application of reinforcement (reward) to a response (specific behavior) after an inconsistent amount of time has passed. In this type of operant conditioning reinforcement schedule, the amount of time changes (on a variable schedule), and the reinforcement is applied after the unspecified amount of time passes. From the given question, Susan is on a variable-interval schedule of reinforcement because the amount of time of each commercial breaks during the game is on a changing/variable schedule (differs) and is unpredictable.

the aorta is the large artery leaving the heart branches into smaller arteries, which eventually branch into capillaries.the arteries carry oxygen and nutrients away from your heart, to your body's tissues. the capillaries are small, thin blood vessels that connect the arteries and the veins. the statement that arteries carry oxygen-rich blood to capillaries is true. veins on the other hand are blood vessels that take oxygen-poor blood back to the heart.