Threats to internal validity include all of the following EXCEPT ...

[neverstopbelieb]

Threats to internal validity include all of the following EXCEPT
 
  A) selection bias. B) quasi-experimental.
  C) testing. D) history.

Question 2

The principle of voluntary consent
 
  A) means that participation in a study must be voluntary at all times.
  B) has no relevance to human subject research.
  C) applies only to animal research.
  D) doesn't include telling human volunteers their rights.

[ryhom]

Answer to Question 1

B

Answer to Question 2

A

[neverstopbelieb]

TYSM

[bigcheese9]

Thanks for the timely response, appreciate it