In an experiment, the researcher was unintentionally talkative to ...

[drink]

In an experiment, the researcher was unintentionally talkative to one of the participant groups. What best describes the threat to internal validity and why is it a threat?
 
  a. Randomness, since being talkative can make this particular group more relaxed and better able to perform.
  b. Participant-maturation interaction, since being friendly to one group can introduce a confound.
  c. History, since this unintended interaction was not part of the independent variable, a confound was introduced.
  d. Testing, since the other group might feel cheated for being treated more formally by the researcher, and this introduces counterbalancing.

Question 2

For a study to be considered a true experiment according to Campbell and Stanley, there must be at least ____ level(s) of the independent variable.
 
  a. random
  b. 1
  c. 2
  d. 3

[Loise Hard]

Answer to Question 1

C

Answer to Question 2

C

[drink]

Thanks for the timely response, appreciate it

[Bigfoot1984]

Excellent