Question

question 4
imagine you are collaborating with researchers studying the effect of marijuana on driving. participants are assigned by chance to either a) receive a pill that contains thc, the active ingredient in marijuana, or b) a harmless placebo pill. neither the researchers nor the participants know who is getting which pill. after taking the pill, participants are asked to drive a computerized driving simulator. the number of collisions participants have is measured.
participants who receive the placebo pill are in the ___________ group.

experimental
observational
control
self - report

Explanation:

In experimental research, the control group is the group that does not receive the active treatment (here, the THC pill) and instead gets a placebo. This group serves as a baseline to compare against the group receiving the experimental treatment. The experimental group gets the active substance, observational refers to non-interventional studies, and self-report is a data collection method, not a study group type.

Answer:

control