Suppose you wanted to determine whether the use of marijuana causes car accidents. consider the major limitations and merits of using each of the following research methods with the correct research method: an experiment, a naturalistic observation, a survey, and a case study. which of these research methods has the following merits and limitations? merits - can manipulate independent variable (marijuana), and control other variables (traffic, condition of the car, etc.) to identify cause and effect limitations - not ethical to cause an accident - not legal/ethical to assign some participants to use marijuana