Genetics likely play a(n) role in explaining somatic symptom disorders

Some teratogens only cause damage during a critical period of development

Indicate whether this statement is true or false.

You are observing the bar-pressing behavior of rats in Skinner boxes; the reinforcer is food pellets. The rats have been trained on different reinforcement schedules and today's session is occurring after 24 hours of food deprivation

You notice that the rats exhibit different rates of behavior. For example, even though both rats started pressing at the same time, one rat is still pressing at a high rate, whereas another rat has stopped pressing after a short time. Which schedule of reinforcement is likely to explain the behavior of the rat that has stopped pressing? a) FR 1 b) FR 25 c) FR 100 d) FR 250