SCS 2150 Lecture Notes - Lecture 4: Cohort Study, Structured Interview, Internal Validity

• School: University of Ottawa
• Department: Social Sciences
• Course: SCS 2150
• Professor: ivan Katchanovski

Document Summary

Validity: refers to the amount of integrity to the conclusions. Measurement validity: are you measuring what you want to measure? . Internal validity is concerned with the issue of whether causation has been established by a particular study. External validity is concerned with whether the ndings are applicable outside of the research environment (1) and if they can be generalized beyond the people studied (2) True experiments are common in psychology and organizational studies but rare in sociology or political science. Many variables of interest are not subject to experimental manipulation. Many phenomena of interest have long-term, complex causes that cannot be simulated in experiments. Even where applicable, experimental models do not get at the perceptions and feelings of research subjects. Eld experiments: are conducted in real life surroundings. Laboratory experiments: take place in arti cial environments. Quasi-experiments differ from true experiments in that internal validity is harder to establish.