Who introduced the concept of reinforcement into behaviorism? ...

[geodog55]

Who introduced the concept of reinforcement into behaviorism?
 
  a. Freud c. Watson
  b. Skinner d. Piaget

Question 2

The groups of participants in a typical pretest-posttest design with nonequivalent groups are usually created by means of:
 
  A) prescreening
  B) matching
  C) using random selection
  D) using random sampling

[nikmaaacs]

Answer to Question 1

B

Answer to Question 2

B

[geodog55]

Wow, this really help

[rachel]

Thanks for the timely response, appreciate it