Question

Which of the following studies illustrates an experimental design? A scientist found a relationship between people's reported daily stress and life satisfaction A psychologist reported that people who voted in the last election felt more optimistic than those who did not. A therapist concludes couples told to write down positive things about their partners were happier than those told to write down negative things, A researcher measured how much alcohol students drank on the weekend and their GPA for the semester.

Answer 1

The answer is:

${\color{DarkGreen} \text{ a researcher measured how much alcohol students drank on the weekend and their GPA for the semester}}$

The researcher actually collected data for this instead of just reporting a conclusion based on their jusgement/without any study to back up that claim. Hence the last option is the correct answer and illustrates an experimental design.

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