Molly is eating red and black jellybeans from a paper bag. she is not looking at the jellybeans as she eats them. she likes red jellybeans, but she does not like black jellybeans. the amount of jellybeans she has to take from the jar before she gets a red one is never the same. which of the following statements is true? a. molly is on a fixed-interval schedule of reinforcement. b.molly is on a variable-interval schedule of reinforcement. c.molly is on a fixed-ratio schedule of reinforcement. d.molly is on a variable-ratio schedule of reinforcement.

D. Molly is on a variable-ratio schedule of reinforcement.

Explanation:

Variable-ratio schedule: In psychology, the term variable-ratio schedule is a reinforcement schedule which is a part of the operant conditioning theory. The variable-ratio schedule is defined as a reinforcement schedule whereby a response is being reinforced after an uncountable number of responses. This schedule is considered to be a high and steady responding rate.

Example: Gambling.

In the question above, the given statement signifies that Molly is on a variable-ratio schedule of reinforcement.

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.