手法を比較

	Longitudinal Interpretive Phenomenological Analysis (L-IPA)（縦断的解釈現象学分析）	Thematic Analysis
分野	質的手法	質的研究
系統	Process / pipeline	Process / pipeline
提唱年	2000s–2010s (IPA from mid-1990s; longitudinal variant formalised ~2009–2014)	2006
提唱者	Jonathan A. Smith and colleagues; longitudinal extension developed by Smith, Flowers, and Larkin	Virginia Braun and Victoria Clarke
種類	Qualitative research design and analysis approach	Method
原典	Smith, J. A., Flowers, P., & Larkin, M. (2009). Interpretive Phenomenological Analysis: Theory, Method and Research. Sage. ISBN: 978-1412908344	Braun, V., & Clarke, V. (2006). Using thematic analysis in psychology. Qualitative Research in Psychology, 3(2), 77–101.
別名	L-IPA, longitudinal IPA, repeated-interview IPA, temporal IPA	TA, Reflexive Thematic Analysis
関連	4	3
概要	Longitudinal Interpretive Phenomenological Analysis (L-IPA) extends the IPA tradition by interviewing the same participants at multiple time points, allowing researchers to trace how the meaning of a lived experience evolves over time. Grounded in phenomenology and hermeneutics, L-IPA preserves idiographic depth at each wave while adding a temporal dimension that cross-sectional IPA cannot provide. It is used widely in health psychology, illness adjustment studies, and any domain where experience unfolds across a significant time span.	Thematic Analysis (TA) is a qualitative research methodology for identifying, analyzing, and reporting patterns (themes) in qualitative data. Developed systematically by Virginia Braun and Victoria Clarke (2006), TA is flexible and accessible, applicable across diverse theoretical frameworks and data types, making it one of the most widely used qualitative methods in psychology, health research, and social sciences.