Methoden vergleichen

	Longitudinal Structured Interview	Längsschnittstudie
Fachgebiet	Umfragemethodik	Umfragemethodik
Familie	Process / pipeline	Process / pipeline
Entstehungsjahr	1970s–present	1940s (panel survey tradition); longitudinal designs codified mid-20th century
Urheber	Established practice in panel and cohort research; codified in survey methodology literature from the 1970s onward	Established tradition; formalized in social science by Paul Lazarsfeld and colleagues (1940s panel studies)
Typ	Longitudinal quantitative data collection method	Quantitative / mixed-methods survey design
Wegweisende Quelle	Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922452	Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922292
Aliasnamen	panel structured interview, repeated structured interview, longitudinal survey interview, wave-based structured interview	panel survey, repeated-measures survey, longitudinal panel study, wave survey
Verwandt	4	3
Zusammenfassung	A longitudinal structured interview applies a fixed, standardised interview schedule to the same participants at two or more points in time. By holding the instrument constant across waves, the method enables genuine within-person change to be measured, trends to be tracked, and causal sequences to be examined with far greater confidence than a single cross-sectional interview can provide. It is widely used in panel studies, cohort research, and programme evaluations.	A longitudinal survey collects structured questionnaire data from the same individuals or units at two or more distinct points in time. By tracking the same respondents across waves, researchers can distinguish genuine change from stable individual differences, establish temporal ordering between variables, and model trajectories of attitudes, behaviors, or outcomes in ways that a single cross-sectional snapshot cannot support.