手法を比較

	Contextual Inquiry	レトロスペクティブ・シンクア aloud（振り返り発話法）
分野	ヒューマンコンピュータインタラクション	ヒューマンコンピュータインタラクション
系統	Hypothesis test	Hypothesis test
提唱年	1993	1980
提唱者	Hugh Beyer and Karen Holtzblatt	K. Anders Ericsson, Herbert Simon, adapted by Gary Olson and colleagues
種類	In-situ user research method capturing real work practices	Post-task verbalization method for reflecting on decision-making
原典	Beyer, H., & Holtzblatt, K. (1998). Contextual Design: Defining Customer-Centered Systems. Morgan Kaufmann. ISBN: 1-558-60722-X	Ericsson, K. A., & Simon, H. A. (1980). Verbal reports as data. Psychological Review, 87(3), 215–251.
別名	CI, Contextual Design, Work-centered Design	Delayed Verbalization, Post-task Thinking Aloud, RTA
関連	4	4
概要	Contextual Inquiry is a field research method for understanding users by observing and interviewing them in their real work environment. Developed by Hugh Beyer and Karen Holtzblatt at Applied Research and Technology, this method combines ethnographic observation with targeted questioning to capture not just what users say they do, but what they actually do—including workarounds, informal practices, and priorities often invisible in lab settings. Contextual Inquiry uncovers the context, constraints, and real-world complexity of user tasks, providing rich insights for user-centered design.	Retrospective Think-Aloud is a variant of the Think-Aloud Protocol in which participants complete a task without verbalization, then immediately review a video or replay of their task performance and narrate their thoughts, reasoning, and reactions. This method captures post-hoc reflection on decision-making and user experience without disrupting task execution. Particularly valuable for exploring user awareness, emotional reactions, and retrospective sense-making, Retrospective Think-Aloud provides the explanatory richness of concurrent thinking aloud without the disruption.