Carlos trains a pigeon to peck a disk by reinforcing each disk peck. Once the response is learned, Carlos begins to cut back on the reinforcers. At first he reinforces every other response, then every third response, every fifth response, every tenth response, and so on. Carlos is using a procedure called .

How does cloud cover affect how much infrared light is reflected back to the ground?

What was the social class pyramid during the civil war?

Dominic and stacy each have a stamp collection. dominic has six fewer stamps than three times the number of stamps stacy has. dominic and stacy decide to give all of their stamps to their younger sister, mary. if stacy had s stamps, which expression represents the number of stamps that mary received? a. (3s − 18)(3s − 6) b. 2s − 18 c. 4s − 6 d. 4s − 18