手法を比較

	多層混合研究法デザイン	多段階混合研究デザイン
分野	研究デザイン	研究デザイン
系統	Process / pipeline	Process / pipeline
提唱年	Late 1990s–2000s	2007 (first edition of Designing and Conducting Mixed Methods Research)
提唱者	Bonnie Nastasi, John Hitchcock, and collaborators; systematized by Creswell & Plano Clark	John W. Creswell & Vicki L. Plano Clark
種類	Mixed methods research design	Mixed methods research design
原典	Creswell, J. W., & Plano Clark, V. L. (2018). Designing and Conducting Mixed Methods Research (3rd ed.). Sage Publications. ISBN: 978-1483357829	Creswell, J. W., & Plano Clark, V. L. (2018). Designing and Conducting Mixed Methods Research (3rd ed.). Sage. ISBN: 978-1483substitute
別名	multilevel MMR, nested mixed methods, hierarchical mixed methods design, cross-level mixed methods	multiphase design, multiproject mixed methods, programmatic mixed methods, multistage mixed methods
関連	5	6
概要	Multilevel mixed methods design is a research approach that collects and integrates both quantitative and qualitative data at two or more distinct levels of a social or organizational hierarchy — for example, individuals nested within classrooms, classrooms within schools, or patients within healthcare teams. By pairing quantitative measurement of outcomes at one level with qualitative exploration of meaning at another, researchers gain a richer, more complete picture than either strand alone could provide.	The multiphase mixed methods design is a sustained research program in which quantitative and qualitative strands are combined across three or more sequential phases — or across multiple related projects — to address a central program objective. Each phase builds on the prior phase's findings, making the design well-suited to long-term evaluation, intervention development, and large-scale program assessment where a single data-collection cycle cannot fully address the complexity of the research problem.