Marjoe has trained his dog that whenever it saw a photo of the cat next door, it would receive a treat. Through multiple pairings of the photo and the treat, the dog came to salivate when the photo alone was presented. Marjoe then extinguished the salivation behavior by presenting the photo but withholding the treat. He was surprised to find that, a week later, when he happened to hold up the photo of the cat, his dog started to salivate. What is going on here ?a) spontaneous recoveny b) stimulus discrimination c) stimulus generalization d) regenerative responding

The correct answer is letter A

Spontaneous recovery refers to the reappearance of the conditioned response after a rest period or less response period. If the conditioned stimulus is unconditioned it is not associated, an extinction.

For example, in Ivan Pavlov's classic experiment, dogs were conditioned to salivate at the sound of a bell. Pavlov also noted that failing to match the sound to the presentation of the food led to the extinction of the salivation response.

However, after a two-hour rest period, the salivation response suddenly reappeared when the bell sounded.

For another example, imagine that you used classic conditioning to train your dog to expect food whenever he hears the sound of a bell. When you ring the bell, your dog runs into the kitchen and searches for its food container. After the response has been conditioned, you stop presenting food after ringing the bell. Over time, the response becomes extinct, and your dog stops responding to the sound. You stop ringing the bell completely, but a few days later you decide to try to ring the bell again. Your dog runs into the room and waits for his bowl, showing a spontaneous recovery from the conditioned response.

1. state-issued photo ids. provide them for free for those who can't afford them.

2. the system we have seems to be working nearly perfectly. seems like about 31 cases per billion votes cast

3. the national policy for hiring new employees which requires proof of eligibility to work. there are something like 20 types of identification which can be used for this.

answer; people have no objective standard by which to judge themselves;