rats what do you think is the reason for the difference in their behavior the animal on the left is hungry the one on the right with the food in its cage is satiated well this difference  drive effect there in order to see whether the difference in dry will produce a difference in learning we're going to use an operator's with two identical compartments one for the animal that is very hungry and another for the animal that is not at the outside end of each compartment is a food delivery operates this consists of a stirrup shaped bar placed above a food that pressing the bar delivers a small pile of food into the dish immediately below we will now put the hungry on the satiated animals of the operators and watch what differences and learn after being put in an unfamiliar environment both animals are active but the hungry animal is somewhat more active the hungry animal remains active but as the satiated one becomes adapted to the new environment he settles down and becomes in acti since each of these responses occurs without reward it is soon displaced by a new response the behavior is var stands up near the bar but just misses it the correct response of pressing the bar cannot be rewarded and learned until later  he approaches the food device stands up near the bar presses it but simply does not see the fellow then the food cart is not rewarded now he finds the pellets and is rewarded for approaching the food at last he hits the bar and gets an immediate reward as he learned will it take him as long to press the bar the next time although the animal still makes quite a few irrelevant responses he presses the bar much sooner the second time the occurrence of a single reward has strengthened the tendency to make the response of pressing the bar will see that coming up to the bar from a slightly different angle the right makes a new response he goes around the side of the stair up instead of down through it he goes back to his old response he still makes a few irrelevant responses all response of diving through the for a number of trials and then are gradually eliminated after several more trials which are not shown in the picture the hungry animal has eliminated irrelevant responses he has learned to press the bar efficiently now what do you think the satiated animal is learning to do with this device we can put a mild electric shock on the grid on which the rats that the shark has adjusted to be annoying but not  this is because the drive produced by electric shock is stronger than one that makes the rat more active than can be reduced more quickly and completely we have demonstrated that the satiated animal is not innately stupid or lazy all we need is a little motivation again a mild electric shock can be administered through the grid on the floor of the operator's this time it can only be turned off by rotating a wheel as soon as the wheel is moved the shot goes off and stays off till the next the end of the punishment reinforces th when he starts by being the experimenter turns off the shot responding to another animal by striking him these animals have already been trained the experimenter turns off the shock as soon as they strike each other the hungry animal learns the response which is rewarded by the food that reduces its hunger dr animal is an active without hunger food would not be a reward even if he got it therefore he does not learn but want to drive it supplied by giving him a mild electric shock  learn any response which occurs and is promptly followed by a reduction in the strength of the drop in this way motivation reward control learn