手法を比較

	Contextual Inquiry	思考発話法
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 and Herbert A. Simon, adapted to HCI by Clayton Lewis
種類	In-situ user research method capturing real work practices	Protocol for capturing user cognition and decision-making during task execution
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	Talk-Aloud Protocol, Concurrent Thinking Aloud, TA
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.	The Think-Aloud Protocol is a usability testing method in which participants verbalize their thoughts while completing tasks on a system. As users navigate an interface, they continuously narrate their observations, interpretations, and reasoning, allowing researchers to understand their mental models, decision-making, and frustration points. Originating from cognitive psychology research by Ericsson and Simon (1980), this method was adapted for HCI by Clayton Lewis and has become one of the most widely used techniques for identifying usability problems and understanding user behavior.