AP PSYCHOLOGY

Detailed explanation-1: -Clinical and demographic characteristics define the target population, the large set of people in the world to which the results of the study will be generalized (e.g. all schizophrenics). The study population is the subset of the target population available for study (e.g. schizophrenics in the researcher’s town).

Detailed explanation-2: -Therefore, The extent to which the findings of a research study are generalizable is called External validity.

Detailed explanation-3: -The target population is the total population about which information is required. Ideally this should be the population at risk. The study population is the population from which a sample is drawn. Typically, the target population and study population should be the same.

Detailed explanation-4: -The generalizability of a study’s results depends on the researcher’s ability to separate the “relevant” from the “irrelevant” facts of the study, and then carry forward a judgment about the relevant facts, 2 which would be easy if we always knew what might eventually turn out to be relevant.

Detailed explanation-5: -• A population is the group that is being studied by the research. • A sample is any subset of the population. Example: A principal gives the students in her school a survey to fill out. The entire school is the population. One classroom of students would be a sample.