Read:

Mogilner, C. (2010). The pursuit of happiness: Time, money, and social connection. Psychological Science, 21(9), 1348-1354.

Then:

1. Identify each independent variable in Experiment 1a. (This should include the number of levels of each IV)

2. Identify each dependent variable in Experiment 1a.

3. State what type of assignment procedure was used in Experiment 1a.

Finally, answer this question:

4. The author attempted to improve the study's external validity in Experiments 1b and 2. Do you think she was successful?