Validity In the research paradigm, validity and reliability are the most basic characteristic issues used in qualitative and quantitative analysis. Validity as a psychometric standard is embedded in a positivist approach, which is relevant to reflect on the qualitative point of view attributed to the ascertainment of truth. In view of this, the definition of positivism attributes validity to a systematic theory. Furthermore, other empirical conceptions that culminate from resident validity include truth, deduction, universal laws, proof, reason, and reality among others. For any qualitative research conducted, validity as a concept is a determinant that measures the truth related to the investigation. Validity is measured by researchers by asking questions, and the answers are retrieved from other people's research work (Joppe, 2000, p. 1). Other researchers define validity in quantitative research as construct validity. The construct involves the initial concept, hypothesis, notion, or question that determines the data collected and the method of data collection. However, quantitative practitioners affirm the cause or effect interaction between the data and build investigation validation by applying testing procedures or processes (Golafshani, 2003, p. 599). Consequently, regarding validity, researchers conclude that the question is whether mean measurements are accurate or whether they measure intended characteristics. The accuracy of the mean helps to relate the cause-effect relationship present in internal validity. The above definition is associated with quantitative research methodology. It summarizes that validity is the extent to which instruments measure exactly the thing they are intended to measure. An example of validity in research is......half an article......information provided during your studies. In the case of project construction management, leaders need to be aware of the variables that influence internal and external validity to be able to convince readers about the aspects introduced and which need further research. References Creswell, J. (2000). Determining validity in qualitative inquiry. Theory into Practice, Vol. 39, n.3, pp. 124-131.Cozby, P & Bates, C. (2012). Methods in behavioral research. New York, NY: McGraw-Hill. Golafshani, N. (2003). Understanding reliability and validity in qualitative research. TheQualitative Report 8 (4), 597-607. Scandura, T & Williams, E. (2000). Research Methodology in Management: Current Practices, Trends, and Implications for Future Research. Academy of Management Journal 43 (6),1248-1264. Trochim, W., & Donnelly, J. (2008). Chapters 1, 3, 5, 6, 7