手法を比較

	Media Richness Analysis	コンテンツ分析	Manifest Content Analysis
分野	Communication	質的手法	Communication
系統	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	1986	Systematised through Krippendorff's methodology work; 4th edition 2018	1952
提唱者	Richard L. Daft & Robert H. Lengel	Klaus Krippendorff (systematic formulation); roots in early 20th-century communications research	Bernard Berelson; codified by Klaus Krippendorff
種類	Framework and method for assessing channel richness vs. task equivocality	Qualitative / mixed-method research technique	Systematic quantitative coding of explicit message content
原典	Daft, R. L., & Lengel, R. H. (1986). Organizational information requirements, media richness and structural design. Management Science, 32(5), 554–571.	Krippendorff, K. (2018). Content Analysis: An Introduction to Its Methodology (4th ed.). Sage. ISBN: 978-1506395661	Krippendorff, K. (2004). Content Analysis: An Introduction to Its Methodology (2nd ed.). Thousand Oaks, CA: Sage. ISBN: 9780761915454
別名	Media richness theory analysis, Information richness analysis, Channel richness assessment, Ortam Zenginliği Analizi	İçerik Analizi, systematic content coding, quantitative content analysis	Quantitative manifest coding, Surface-content analysis, Manifest-level content analysis, Berelson content analysis
関連	3	5	5
概要	Media richness analysis applies Daft and Lengel's media richness theory to evaluate communication channels by their capacity to carry rich information and to assess how well a channel fits the equivocality of the task at hand. Rooted in organizational communication, it provides criteria — feedback immediacy, multiplicity of cues, language variety, and personal focus — for ranking channels from lean (a memo) to rich (face-to-face) and for diagnosing whether managers and teams are matching channel to message appropriately.	Content analysis is a systematic research technique for reducing text, visual, or media material into coded categories so that patterns can be counted, compared, and interpreted. Formalised by Klaus Krippendorff in his widely cited methodology textbook (latest edition 2018), the method sits at the boundary of qualitative and quantitative inquiry: it imposes structured, replicable coding on inherently meaning-laden material.	Manifest content analysis is a quantitative research technique that systematically counts the explicit, surface-level features of communication messages — words, sources, themes, images, or actors that are directly visible in the text or media artifact — according to a predefined coding scheme. Rooted in Bernard Berelson's classic definition of content analysis as the 'objective, systematic, and quantitative description of the manifest content of communication,' it is one of the foundational empirical methods of mass communication and media research.