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. this study uses a(n) design.

Experimental

Explanation:

The given example is an experimental design research study because participants are assigned to two groups, one will receive a THC pill and the other will receive a placebo pill. Hence, the researchers are experimenting that what kind of affect occurs and is then recorded. When such a setting is created in a research then it is an experimental research design as the researchers are clearly interfering and are in contact with the participants of the study.

you probably know the answer. stop asking stupid questions and making me waste my time. j.k. ; )   b.t.w. what are three ratios equivalent to 5 : 11? thx

its tr3way you already know