Unit 4 · Topics 4.3 / Scientific investigation

A group changes the answer

Use random assignment and identify causal limits.

About 10 minutes · Original short practice · Untimed

Start with the evidence.

Question 1 / 2

What does random assignment primarily help address?Whether the volunteers represent all adultsWhether the hypothesis is morally desirableWhether every participant has the same personalityPreexisting differences between the experimental groups

Question 2 / 2

Which causal interpretation needs the most caution?The assigned conditions differ in public response and exposure to group answers.Only public visibility caused the difference, independently of hearing the group.The campus volunteer sample limits generalization.The data describe a higher mean in one condition.

A short written explanation

Explain a strength of random assignment and one reason this design does not isolate the effect of answering publicly alone.

Open a sentence starting point

Random assignment helps ___. However, the conditions differ in both ___ and ___, so ___.

0 words · Write at least 12 before opening the revision guide. Written reasoning is reviewed by a teacher.

A group changes the answer · Student practice record

A group changes the answer · AP Psychology

Unit 4 · Topics 4.3 · In progress

Mode: guided. Hints opened: 0.

Study brief
Ninety adult volunteers from one campus are randomly assigned to answer a judgment task publicly after hearing a unanimous group response or privately without hearing that response. Stimuli and time limits are otherwise the same. The public-group condition has a higher mean rate of matching the group’s incorrect answer. This is a fictional experiment; no inferential test is supplied.

Evidence marked: None

Question 1: What does random assignment primarily help address?
First checked response: Not checked

Question 2: Which causal interpretation needs the most caution?
First checked response: Not checked

WRITING PROMPT
Explain a strength of random assignment and one reason this design does not isolate the effect of answering publicly alone.

FIRST DRAFT
Not written

REVISED RESPONSE
Not written

REVISION NOTE
Not written

SELF-REVIEW
Explain distribution of preexisting differences.: Not reviewed
Name public/private response and group-answer exposure.: Not reviewed
Limit the causal claim to the bundled conditions.: Not reviewed

TRANSFER
A revised study gives both groups the same group answers but varies only public versus private response. What improves?
Not checked

Choice checks: 0/2. Transfer: Not checked. Written work requires teacher review; these are not AP points.

Original fictional teaching study. These are invented observations, not published research findings.