Case Study: When scientist focus on the study of one person or just a few individuals
Advantage: when Scientist concentrate their attention on a very small number of people, they can gain an incredible amount of awareness into those cases. The information that is collected in case studies is unequalled by any other single research method. This allows the researcher to have a very deep and close understanding of the individuals and the particular phenomenon being studied.
Disadvantage: although scientist wants fast result, concentrating attention on special group of people can make it difficult to control any observation to the larger population as a whole. Studying a large group of subjects can cause confusion and on steady data.
Naturalistic Observation: understanding how behavior transpires in its natural perspective.
Advantage: The greatest advantage of naturalistic observation is the validity, or accuracy, of information collected unobtrusively in a natural setting.
Disadvantage: Many individuals do not feel comfortable answering a question honestly or when being observed by other, the subject changes his or her behavior to how they want to be seeing not for who they really are. Real situation like this is hard to control.
Surveys: Are lists of questions to be answered by research participants that can be transported as paper and pencil questionnaires, directed electronically, or conducted verbally. Advantage: Surveys allow researchers to collect data from larger samples than may be given by other research methods. A larger sample is better to reflect the actual range of the population, allowing better generalizability. If the sample is sufficiently large and diverse, the researcher can assume that the data that is collected from the survey can be generalized...