If you wanted to determine whether people are faster at ...

[appyboo]

If you wanted to determine whether people are faster at responding to a high intensity light than to a low intensity light you might do an experiment in which participants push a button whenever either a high or low intensity light occurs. If you were concerned with order effects such as learning but also concerned that an equal number of low- and high-intensity trials be presented, you might use
 
  A) randomization within blocks.
  B) control variables.
  C) a confounding variable.
  D) reverse ordering.

Question 2

If I want to generalize the results of the sample of participants I used in my experiment to the larger population of potential participants I would need to be concerned with
 
  A) controlling all extraneous variables.
  B) selecting a random sample of participants.
  C) having a lot of random variables in the experiment.
  D) having good internal validity.

[bimper21]

Answer to Question 1

A

Answer to Question 2

B

[appyboo]

Thanks for the timely response, appreciate it

[covalentbond]

Great answer, keep it coming