Case Study #1
A psychologist interested in intelligence, expertise, and memory recruits 60 people, 30 with IQ scores between 130 and 140, and 30 with IQ scores between 100 and 110. Within each group, half could be considered experts in their knowledge of ches, while the other half could be considered beginners. All the participants are given five lists of words to memorize and recall.
Case Study #2
In a study of crowding, introverts and extraverts are to be compared. Some are tested in a large room, others are tested in a medium-sized room and others are tested in a small room. While in the room, participants fill out an anxiety survey (Psychological test), then listen to a series of brief segments of five heavy metal songs and rank them from the most annoying to the least annoying.
Case Study #3
To assess the effects of concurrent eating on beverage preferences, a researcher randomly assigns participants to “eating” and “non-eating” groups. Those in the first group are given a variety of snacks to eat while completing a beverage test; those in the second group have no snacks to eat during the beverage taste test. In the taste test, each participants judges four varieties of wine(Merlot, Zinfandel, Riesling, Pinot Noir). After all of the wines have been tasted, each participant ranks the four varieties of wine indicating overall preference.
For each case study, the essay must answer the following:
• Identify the independent variables
• Indicate the levels of the independent variables and whether they are between or within-subjects
• Identify dependent variable(s)
• Identify the notation system of factorial design