手法を比較

	ロングチュディナル構成主義グラウンデッド・セオリー	縦断的ケーススタディ
分野	質的手法	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	2006 (Charmaz's constructivist GT); longitudinal application from ~2000s onward	1984–1990 (foundational methodological codification)
提唱者	Kathy Charmaz (constructivist GT); extended to longitudinal designs by qualitative longitudinal researchers	Robert K. Yin (case study methodology); Andrew M. Pettigrew (longitudinal field research)
種類	Qualitative research design and analysis approach	Qualitative research design
原典	Charmaz, K. (2006). Constructing Grounded Theory: A Practical Guide Through Qualitative Analysis. Sage. ISBN: 978-0761973522	Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169
別名	longitudinal CGT, constructivist GT longitudinal, longitudinal Charmaz grounded theory, temporal constructivist grounded theory	longitudinal case research, panel case study, repeated case study, temporal case study
関連	5	6
概要	Longitudinal Constructivist Grounded Theory combines Kathy Charmaz's constructivist variant of grounded theory — which foregrounds the co-construction of meaning between researcher and participants — with a multi-wave, time-extended data collection design. Rather than capturing a single snapshot, the researcher returns to the same participants across two or more time points, allowing the emergent theory to track how processes, identities, and social meanings develop, shift, or stabilise over time.	A longitudinal case study is a qualitative research design that combines the in-depth, contextually rich focus of case study methodology with repeated data collection across multiple time points. Rather than capturing a single snapshot, it follows one or a small number of cases — an individual, group, organisation, or programme — over months or years to trace how processes, relationships, and meanings evolve. This design is well suited to questions about how and why things change, not merely what the state of affairs is at one moment.