The internal validity of the pre-post designs is threatened by ...

[Haya94]

The internal validity of the pre-post designs is threatened by threats related to time.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

When an effect occurs when the proposed cause occurs, but the effect does not occur when the proposed cause has not occurred, ____ has been demonstrated.
 
  a. temporal precedence
  b. covariation
 c. plausibility
 d. causality

[cascooper22]

Answer to Question 1

True

Answer to Question 2

b

[Haya94]

Thanks for the timely response, appreciate it

[steff9894]

TYSM