The Iris Is Actually a Muscle in the Choroid Layer

question 140

True/False

The iris is actually a muscle in the choroid layer.

---

Definitions:

Token-economy System

A behavioral modification technique based on systematic reinforcement, using tokens as conditional reinforcement that can be exchanged for desired rewards.

Partial Reinforcement

A conditioning schedule in which a reward is not provided every time the desired behavior is performed, leading to more resistant learned behaviors.

Extinction Procedure

A behavioral technique in which reinforcement of a previously reinforced behavior is discontinued, leading to a decrease in the frequency of the behavior.

Operant Conditioning

A process of acquiring knowledge in which the force of an activity is changed by either positive reinforcement or penalties.