So sánh phương pháp

	Phản ánh suy nghĩ hồi cứu	NASA-TLX
Lĩnh vực	Tương tác người-máy tính	Tương tác người-máy tính
Họ	Hypothesis test	Hypothesis test
Năm ra đời	1980	1988
Người khởi xướng	K. Anders Ericsson, Herbert Simon, adapted by Gary Olson and colleagues	Sandra Hart and Lowell Staveland
Loại	Post-task verbalization method for reflecting on decision-making	Multi-dimensional post-task questionnaire for measuring subjective mental workload
Công trình gốc	Ericsson, K. A., & Simon, H. A. (1980). Verbal reports as data. Psychological Review, 87(3), 215–251.	Hart, S. G., & Staveland, L. E. (1988). Development of NASA-TLX (Task Load Index): Results of empirical and theoretical research. In P. A. Hancock & N. Meshkati (Eds.), Human Mental Workload (pp. 139–183). Elsevier.
Tên gọi khác	Delayed Verbalization, Post-task Thinking Aloud, RTA	Task Load Index, TLX, NASA-TLX
Liên quan	4	4
Tóm tắt	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.	The NASA Task Load Index (TLX) is a multi-dimensional subjective workload assessment tool developed at NASA Ames Research Center by Sandra Hart and Lowell Staveland in the 1980s. TLX measures perceived mental workload across six dimensions—mental demand, physical demand, temporal demand, performance, effort, and frustration—allowing researchers and practitioners to understand the cognitive and affective burden of tasks and interfaces. The instrument is widely used in human factors, cognitive engineering, and HCI to identify task bottlenecks and evaluate system designs.