Question

Control of the internal validity 1: The placebo effect of the internal validity can be cured by random assignment subject to both experimental and control placebo groups(Shader, 2017). 2: History threat can be removed by assigning random subjects to both control and experimental groups. 3: Maturation the third threat to validity can be handled with the help of the control groups of subjects which can change those in experimental groups. Assigning of random subjects can also be used. 4: Repeat testing threat can controlled through control groups which receive repetition during testing but no have no experimental intervention. 5: Instrumentation can be solved by the procedure of control to eliminate systemic bias. 6: Statistical regression can be cured with the help of assigning random subjects at initial stage on low score to an experiment and control groups. 7: Selection of bias can be handled by randomly assignment subjects to both experimental and control groups. 8: Experimental mortality have no complete care but there is need to avoid dropouts, fixed the causes behind dropouts. Control of the externalvalidity External validity can be avoid by using the various treatments, selecting participants, conditions of environment and larger population samples. However addressing the problems in selection of samples may not assure external validity.

Do you agree with the posted above about to controlling threats to validity? why? You are required to respond no less than 50 words.To support your response you are required to provide at least one supporting reference with proper citation.

Answer 1

Yes I agree with the above posted facts regarding the controlling of internal and external validity of the research performed. Internal and external validity are underlying concepts that describes about whether or not the results and the end statements of a research or study are meaningful and trustworthy. While internal validity tells us about how well a research is being conducted (its structure), external validity tells us about how applicable and reliable are the findings are to the real world.

Internal validity like the history of the subject, Regression analysis and the Experimental Reliability etc is an extent to which a study develops a trustworthy cause-and-effect (co-relation) relationship between a treatment and an outcome.It also tells us about a research that makes it possible to remove alternative explanations for a finding.

External validity tells us about how well the results of a research can be applied to other settings and external environment. In other words, this type of validity refers to how generalised the findings are. For instance, do the results apply to other settings, people, situations, and time periods? Thus, selection of participants, areas and external experiments are a part of it.

Reference: verywellmind.com , Google.com