_________ variables are variables that influence all participants ...

[dalyningkenk]

_________ variables are variables that influence all participants and cause the experimental results to be less clear.
 
  a. Extraneous
  b. Nuisance
  c. Attrition
  d. History

Question 2

Brigham and Women's Hospital conducted a study with two groups of participants. One group was allowed to experience deep sleep, while the other group was deprived of deep sleep. Next, participants in both groups completed a visual task.
 
  Results indicated that performance did improve on the visual task for participants in the group that experienced deep sleep. In this study, what type of research design was used?
 
  a. within subjects design
  b. between subjects design
  c. within participants design
  d. mixed subjects design

[leahm14]

Answer to Question 1

B

Answer to Question 2

B

[dalyningkenk]

YES! Correct, THANKS for helping me on my review

[hollysheppard095]

Thanks for the timely response, appreciate it