Iris folding is a paper craft technique that involves folding strips of colored paper in such a way to form a design.The center of the design forms an iris â a shape reminiscent of the iris diaphragm of a camera lens.istory [edit]. Iris folding originated in Holland, where early craft people made their designs using patterned paper cut from the inside of envelopes. Today, crafters use any light weight paper, such as scrapbook paper, origami paper, wrapping paper, the inside of envelopes or pages of magazines. Ribbon is also used.
Extinction is the disappearance of a previously learned behavior when the behavior is not reinforced. In this lesson, learn more about extinction in operant conditioning and test your knowledge with a quiz.
Extinction is a term that refers to the disappearance of a conditioned response. The response weakens and eventually disappears due to removal of the reinforcement or punishment in operant conditioning or the removal of the paired stimulus in classical conditioning.n review, let's compare Pavlov's classical conditioning and Skinner's operant conditioning alongside each other. Both classical conditioning and operant conditioning are processes that lead to learning.