![]() Validity measures how an instrument can measure a given characteristic in a research field accurately. Reliable data from a research study should be relevant to the problems that the researcher should solve to help in the decision-making process (Lippincott Williams & Wilkins, 2007). In this case, the experiments are done using the same research tools and procedures even if conducted by different researchers. This is achieved when several experiments are done using the same procedure. Reliability refers to the extent to which a given research project can give consistent results and outcome. ![]() External validity explains the depth of study and the level of generalization and comparison with research studies that different authors conduct. Internal validity is the design of conducting research and how the decision making process is undertaken to get the best results. ![]()
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