Vertaile menetelmiä

	Eksploratiivinen kvantitatiivinen tutkimus	Pitkittäistutkimus
Tieteenala	Tutkimusasetelma	Tutkimusasetelma
Menetelmäperhe	Process / pipeline	Process / pipeline
Syntyvuosi	Mid-20th century (codified in social research methods texts c. 1950s–1970s)	Late 19th–early 20th century; methodologically codified through the 20th century
Kehittäjä	Earl Babbie; John Creswell (systematic codification in social science methods)	No single originator; foundational methodological treatments by Stuart Menard and Judith Singer & John Willett
Tyyppi	Non-experimental quantitative research design	Quantitative (or mixed) observational research design
Alkuperäislähde	Babbie, E. (2021). The Practice of Social Research (15th ed.). Cengage Learning. ISBN: 978-0357360767	Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922841
Rinnakkaisnimet	quantitative exploratory design, exploratory survey research, initial quantitative investigation, preliminary quantitative study	longitudinal study, longitudinal design, prospective longitudinal study, repeated-measures observational study
Liittyvät	4	4
Tiivistelmä	Exploratory quantitative research is a non-experimental design used when a phenomenon is insufficiently understood to support formal hypothesis testing. The researcher collects numerical data — typically through surveys, structured observation, or existing records — to describe distributions, detect patterns, and generate hypotheses that more targeted confirmatory studies can subsequently test. It occupies the first stage of a cumulative quantitative research programme.	Longitudinal research is an observational design in which the same participants, groups, or units are measured repeatedly over an extended period. Rather than capturing a single snapshot, it tracks change, stability, and temporal sequencing of variables — making it the primary non-experimental strategy for studying development, growth, decline, and the unfolding of causal processes across time.