Quiz: Garlic prawns
The following quiz assesses students' ability to critically think about a piece of research. The study looks at the role of cognitive biases on restaurant ordering.
To assign this quiz to your students, please go to the student page for this quiz.
If you would like to give them a paper copy, please see the link below.
Crane (2021) wanted to see how exposing restaurant customers to an anchor might affect how much money they were willing to spend on dinner.
To carry out his study, he worked together with a local Italian restaurant. The study took place over two consecutive Friday nights in May 2021. On the first night, the researcher had the waitstaff offer “today’s specials” to the customers. The specials were announced as the waiter was handing out menus.
The waitstaff said: Tonight, we have a wonderful special as a main course – garlic prawns (shrimp) and spaghetti for $38.50.
This is a rather high price for this dish! The researcher wanted to see if this would serve as an anchor when choosing a main course. On the following Friday night, no special was mentioned.
At the end of the evening, the researcher found the average price paid for the main course. He found that on the first night, the average cost of the main course was $24.30; on the second Friday night the average cost was $18.20. No one chose the “special.” It appears that by mentioning the price of the “special,” people were willing to spend more money on their Friday meal.
- Which design was used in this study? What was the independent and dependent variable?
- Comment on the internal validity of this study.
- Explain how one potential participant variable may have affected the study.
- Explain one ethical consideration in this study.
- Comment on the ecological validity of this study.
- Comment on the construct validity of this study.
Each of the responses may earn up to a maximum of three marks, for a total of 18 marks.
1. Which design was used in this study? What was the independent and dependent variable?
2. Comment on the internal validity of this study.
3. Explain how one potential participant variable may have affected the study.
4. Explain one ethical consideration in this study.
5. Comment on the ecological validity of this study.
6. Comment on the construct validity of this study.