In Mr. Medeiros's classroom, students are given play money each time they turn in an assignment; they receive additional amounts of money if the assignment is turned in on time and if it is done correctly. At the end of each week, students can use their play money to purchase special privileges (free time, special privileges, etc.). Mr. Medeiros's approach can best be characterized as:

Mr. Medeiros's approach can best be characterized as: TOKEN ECONOMY.

Explanation: Token economy can be defined as a system of behavior modification based on the principles of positive and negative reinforcement and positive and negative punishment. In this system of behavior modification, participants are rewarded with tokens for engaging in desirable activities. Tokens which are in turn used to purchase special privileges or meaningful objects..

answer; ///attempts to change more than once behavior at the same time;