Aquad
Aquad (an abbreviation of Analysis of Qualitative Data) is open source computer-assisted qualitative data analysis software (CAQDAS). It supports analysis of text, audio, video, and graphical data. Features
Aquad provides functions for content analysis, including:
 Text search: looking for segments in texts
 Classifying: labeling text, audio, image, and videos data
 Writing memos (annotation): inserting annotations linked to parts or whole texts, audios, photos, or videos
 Word analysis: counting words according to criteria
 Retrieval by file name, code, keyword, or content: Retrieval of segments according to criteria
 Tabular analysis: constructing tables combining criteria and arranging data in rows and columns
 Construction of linkage hypotheses: looking for relationships across data
 Comparison of cases/files: contrasting coding across files
 Sequential analysis: objective hermeneutics
 Comparison of cases by Boolean analysis: critical features and identification of "types" as introduced by Charles Ragin. Export data: quantitative software as R, SPSS, and PSPP for statistical analysis. Data context
Data can be directly analyzed on the screen (one-step) or outside (two-steps). One-step allows on-screen coding with digitized data. Two-steps allows the user to enter codes on the screen, keeping the documents on the desk or in other means such as cameras, TVs, etc. For instance, two-steps allows the analysis of recordings, diaries, incunabula, or objects without transcribing, taking photos, or scanning them. Comparison of cases/files by Boolean analysis
Aquad allows comparison of cases/files by "logical minimization", by using its own algorithm and the R package qualitative comparative analysis to determine implicants . Versions
The latest available version is Aquad 8, which is available in German, English, and Spanish. Version 7 is also available for download. See also
Case study
Qualitative economics
Qualitative marketing research
Qualitative psychological research
Qualitative research

References 

 Huber, G. L. & Gürtler, L. (2013) AQUAD 7. Manual: The Analysis of Qualitative data. Tübingen: Ingeborg Huber Verlag. Download 
 Ragin, C. C. (1989) The Comparative Method: Moving Beyond Qualitative and Quantitative Strategies. Berkeley and Los Angeles: University of California Press. Google Books

External links 
 
 Official manual 
 Spanish Association for the Advance of Qualitative Research (2018). AQUAD 7: programa análisis de datos de acceso abierto. Asociación Española para el Avance de la Investigación Cualitativa. Feliz Murias, T. (2012). Análisis de contenido de la comunicación asíncrona en la formación universitaria  (Content analysis of asynchronous communication in the university training).Revista de Educación, 358, Mayo-agosto 2012, pp. 282-309. Gil Flores, J. (Director) (2007). El tratamiento de datos en investigación cualitativa con AQUAD (Data processing in qualitative research). Universidad de Sevilla. López Regalado, O. (2008). Tutorial of Aquad 6. Ricoy Lorenzo, M.C., Sevillano García, M.L. & Feliz Murias, T. (2011). Competencias necesarias para la utilización de las principales herramientas de Internet en la educación (Competences Needed to Use the Main Internet Tools in Education). Revista de Educación, 356. Septiembre-diciembre 2011, pp. 483-507. Qualitative research
Free QDA software