1. Following are examples of different types of Observational Research:
Observation of people in their homes or at work
Accompanied product usage
Recording and analyzing in-store patterns of shoppers
Journal keeping or Diary (text, photo)
In a true experiment, subjects are randomly assigned to the treatment conditions (levels of the independent variable). The only differences in the groups would be due to chance.
Quasi-experiments are sometimes called natural experiments because membership in the treatment level is determined by conditions beyond the control of the experimenter (subjects are already in the box). An experiment may seem to be a true experiment, but if the subjects have NOT been randomly assigned to the treatment condition, the experiment is a quasi- experiment (quasi = seeming, resembles).