After reading this chapter, you should be able to
11.1 Explain the importance of validity in quantitative research.
11.2 Explain the concept of internal/causation validity including the two major types,
the three required conditions, and threats to internal or causation validity.
11.3 Explain the concept of external/generalizing validity including its five major
types.
11.4 Explain the importance of construct validity in research studies.
11.5 Explain the importance of statistical conclusion validity in research studies.
11.6 Explain the concept of research validity/trustworthiness in qualitative research
including the five major types.
11.7 Explain the concept of research validity/legitimation in mixed methods research
including the twelve major types.