It has been shown that telling participants they are free to ...

[craiczarry]

It has been shown that telling participants they are free to decline to participate without penalty
 
  a. results in fewer people agreeing to participate
  b. makes the results less generalizable.
  c. induces participants to ask for a larger reward for participating.
   d. can substantially alter the results obtained in some experiments.

Question 2

In order to isolate the cause of a behavior, research psychologists rely primarily on being able to
 
  a. get authoritative advice.
  b. do statistical testing.
   c. control the environment.
  d. communicate their findings.

[ladyjames123]

Answer to Question 1

D

Answer to Question 2

C

[craiczarry]

Excellent

[emsimon14]

Gracias!