More Practice Problems for Assignment 5
If the scenario was describing an experiment or quasi experiment (i.e. blue box), then for each DV indicate
the FULL name of the test you would use to analyze the data to answer the research question (e.g. 1 way
independent ANOVA, not ANOVA). If you suspect you need to use a 2 way mixed ANOVA, you must
also specify with factor is between subjects and which factor is within subjects.
If the scenario was describing a descriptive research study (i.e. green box), then tell me whether you would
use correlation, regression, or chi-square goodness of fit to answer the research question.
Tip: Use the decision tree helper posted to the class web page to help you pick the correct test.
Does an infant’s autonomic responses (skin conductance) change depending on whether the infant is
breast fed or bottle fed, and whether the mother smiles or doesn’t smile during the feeding? Twenty
mothers with a young infant breastfeeds them half the time and bottle feeds them the other. Within each
feeding method, half the time the mothers smiled during the feeding, the other time they did not.
2 way repeated ANOVA
Do men and women react differently to the dark? A researcher takes a baseline heart rate (HR) reading
for 15 men and 15 women. She then shuts off the lights and records their heart rates. After 1 minute, she
turns the lights back on and measures HR a final time.
2 way mixed ANOVA
Do magnetic bands increase flexibility? A researcher measures flexibility in 40 adults ages 18-30 (# of
cm they can reach beyond their toes while sitting down with their legs out in front of them). After wearing
a magnetic band for 2 weeks, they return to the lab to have flexibility reassessed.
dependent t-test
Does THC (the active ingredient in marijuana) impair spatial learning and memory in rats? A researcher
records how many trials it takes each rat (n = 40) to learn the location of a submerged platform in a water
tank. She then randomly assigns half the rats to the placebo group, and the other half to the THC group.
Thirty minutes later, she tests their memory of the platform by throwing them back into the water tank.
2 way mixed ANOVA
Do graphic anti-smoking TV commercials affect teenagers’ perceptions of smoking? To find out, a
researcher measures “perceived acceptability of smoking” (on a 10 point Likert scale) in 200 middle
school students. Ten weeks later, they watch a series of 5 x 1 min anti-smoking commercials. One week
later, he re-administers the acceptability questionnaire.
dependent t-test