Seven-year-old vinny was a poor sleeper. he had a bad habit of getting up a few times every night, and waking his parents every time, which left the whole family sleep deprived. vinny’s parents decided to award vinny with a sticker every time he slept through the night. after five stickers, vinny will be rewarded with a new dvd of his choice. vinny’s parents are employing the schedule of reinforcement to modify vinny’s sleeping behavior.
a.)variable ratio
b.) fixed ratio

Hiv is inactivated in the laboratory after a few minutes of sitting at room temperature, but the flu virus is still active after sitting for several hours. what are the practical consequences of these findings? a) hiv can be transmitted more easily from person to person than the flu virusb) the flu virus can be transmitted more easily from person to person than hivc) this property of hiv makes it more likely to be a pandemic than the flu virusd) disinfecting surfaces is more important to reduce the spread of hiv than the flu