Part I. Background and Theory: 1. Interaction analysis: an introduction; 2. History of group interaction research; Part II. Application Areas of Interaction Analysis: 3. Dyadic interaction analysis; 4. Observing group interaction: the benefits of taking group dynamics seriously; 5. Unpacking the structures of team interaction patterns; 6. Coding nonverbal behavior; 7. Behavioral coding in animals; 8. Beyond coding interaction: new horizons in interaction analysis; Part III. Methodology and Procedures of Interaction Analysis: 9. Coding interaction: a technical introduction; 10. Rules for coding scheme development; 11. Unitizing verbal interaction data for coding: rules and reliability; 12. Quality control: assessing reliability and validity; 13. Software for coding and analyzing interaction processes; Part IV. Data Analysis and Data Presentation: 14. Coding and counting - frequency analysis for group interaction research; 15. Analysis of interaction sequences; 16. Temporal patterns in interactions: T-patterns and their detection with THEMEtm; 17. Interdependence in small group discussion; 18. Coding and analyzing multiple levels; 19. Introduction to machine learning: teaching computers to code group interaction data; 20. Tint - a technique for visualizing team processes; Part V. Coding Schemes for Interaction Research: General Group Process Systems: 21. The advanced interaction analysis for teams (act4teams) coding scheme; 22. Discussion Coding System (DCS); 23. Interaction Process Analysis (IPA); 24. TEMPO: a time-based system for analysis of group interaction process; Section 1. Argument, Conflict, and Negotiations: 25. Argument - a category system for analyzing argumentation in group discussions; 26. Group working relationships coding system; 27. Micro-conflict coding scheme; 28. Offer: behaviorally coding indirect and direct information exchange in negotiations; 29. Verbal tactics coding scheme (Vtcs); Section 2. Coordination and Coherence: 30. Coco - a category system for coding coherence in conversations; 31. Co-act - a framework for observing coordination behavior in acute care teams; 32. So-Dic-Or: simultaneous observation of distractions and communication in the operating room; Section 3. Cognition and Meta-Cognition: 33. Casorl - coding scheme for the analysis of socially regulated learning; 34. Coding scheme for group creativity; 35. Analyzing critical thinking in group constellations: from discourse analysis to analyzing social modes of thinking; 36. Identifying teacher and student contributions during assessment conversations: the elevate coding scheme; 37. In search of synergy in group decisions: coding hidden profile discussions; 38. Trawis - coding transactive knowledge and knowledge exchange; Section 4. Personality and Team Behavior: 39. The behavior analysis coding system - an applied, real-time approach for measuring and improving interactive skills; 40. Groupness/entitativity observational coding (Geoc): a coding system to assess groupness or entitativity in groups; 41. Assessing group interactions in personality psychology: the Münster behavior coding-system (M-BeCoSy); Section 5. Roles and Relationships: 42. BRRICS: brief romantic relationship interaction coding scheme; 43. (Family) relational communication control coding system; 44. Verbal response modes taxonomy.