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.
Question 2
In an experiment, the researcher _____, in a correlational study, the researcher _____.
a. measures two variables; measures a single variable known as the dependent variable
b. measures two variables; measures a single variable known as the independent variable
c. actively tries to make a relationship; observes to see if a relationship exists.
d. observes to see if a relationship exists; actively tries to make a relationship
Positron emission tomography (PET) image showing the difference in the metabolic activity of the bra
Illustration of the Brain Lobes Showing Location of Broca’s Area and Wernicke’s Area
Example of a choice board used in studies of decision making. This one includes four factors for ...
The ethanol molecule showing two carbon atoms, six hydrogen atoms, and one oxygen atom.
A karyogram of the human chromosome set, showing the distinctive banding pattern of each chromosome.
PCR analysis showing expansion of the CAG repeat region of the HD gene