PSYB01H3 Lecture Notes - Time Series, Regression Analysis, Natural Disaster
Document Summary
Quasi-experiments: similar to a experiment, but does not mean all the requirement as the experiment; also called field- experiment. Key difference to the real experiment: less control of extraneous variables: use random assign is missing: groups often naturally occurring. Matching instead of randomization time series analysis unit of analysis not people could be an organization, a group or other things. Problems would happen as: threats to internal validity you have strong evidence to determine your dependent variables. But in here we cannot really make the conclusion: threats to internal validity. History: event affects study outcome it not only just meaning the things happen before but could be present condition. It is whatever happening between the pretest and posttest. Change in subjects over a period of time. Ex: you look at the gr 8 in the beginning, but ppl are growing older naturally.
