Which of the following studies is best for showing that the first variable causes changes in the second variable?
a. A researcher asks people who are entering the grocery store how hungry they are and then asks them how much they spent on food as they leave the store.
b. A researcher assigns participants to sleep various amounts of hours and then observes how cranky they are.
c. A researcher asks participants how well they like to think and how many books they have read in the last 6 months.
d. A researcher asks participants how many hours per week they listened to Beethoven while growing up and then gives them a math ability test.
B
You might also like to view...
A magician's stock and trade is getting the audience to focus on one aspect of his demonstration while he is manipulating another. This is most easy with preoperational children, as they are easily fooled with their tendency to
be static thinkers. reverse things in their perception. demonstrate centration. equilibrate.
Which stage of sleep has been called "paradoxical sleep"?
a. REM b. NREM 1 c. NREM 2 d. NREM 3.