手法を比較

	コンテンツ分析	調査研究
分野	質的手法	研究デザイン
系統	Process / pipeline	Process / pipeline
提唱年	Systematised through Krippendorff's methodology work; 4th edition 2018	Late 19th century; methodologically systematised 1940s–1960s
提唱者	Klaus Krippendorff (systematic formulation); roots in early 20th-century communications research	Francis Galton, Charles Booth, and early social statisticians; systematised by Paul Lazarsfeld and colleagues at Columbia in the 1940s
種類	Qualitative / mixed-method research technique	Quantitative (and mixed) non-experimental design
原典	Krippendorff, K. (2018). Content Analysis: An Introduction to Its Methodology (4th ed.). Sage. ISBN: 978-1506395661	Fowler, F. J. (2014). Survey Research Methods (5th ed.). Sage Publications. ISBN: 978-1452259000
別名	İçerik Analizi, systematic content coding, quantitative content analysis	survey methodology, questionnaire research, survey design, survey study
関連	5	4
概要	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.	Survey research is a quantitative (and sometimes mixed-methods) design in which a researcher collects standardised self-report data from a sample drawn from a defined population, using a questionnaire or structured interview. It is the dominant non-experimental strategy for describing population characteristics, estimating prevalence, mapping attitude distributions, and testing bivariate or multivariate associations across social, behavioural, and health sciences.