In order to avoid bias in how subjects are assigned to the ...

[swpotter12]

In order to avoid bias in how subjects are assigned to the different treatment conditions, experimenters should use
 
  a. random assignment.
  b. counterbalancing.
  c. random sampling.
  d. self-selection procedures.

Question 2

After the completion of an experiment, a researcher realizes that there is another explanation for the results other than the original hypothesis. The researcher realizes that this experiment is deficient with respect to which type of validity?
 
  a. construct
  b. external
  c. internal
  d. statistical conclusion

[Swizqar]

Answer to Question 1

a

Answer to Question 2

c

[swpotter12]

Thanks for the timely response, appreciate it

[isabelt_18]

YES! Correct, THANKS for helping me on my review