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RSE4801 ASSIGMENT 4
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RSE4801 ASSIGMENT 4
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RSE4801 ASSIGNMNET 4RSE4801
ASSIGNMENT 4
2022
, Assignment 04
Question 1
How could validity and reliability be improved in quantitative research? Use examples from
educational research to illustrate the points you make.
Validity should be viewed as a continuum, at is possible to improve the validity of the findings within
a study, however 100% validity can never be achieved. A wide range of different forms of validity have
been identified, which is beyond the scope of this Guide to explore in depth
The chosen methodology needs to be appropriate for the research questions being investigated and
this will then impact on your choice of research methods. The design of the instruments used for data
collection is critical in ensuring a high level of validity. For example it is important to be aware of the
potential for researcher bias to impact on the design of the instruments. It is necessary to consider
how effective the instruments will be in collecting data which answers the research questions and is
representative of the sample.
It is also necessary to consider validity at stages in the research after the research design stage. At the
implementation stage, when you begin to carry out the research in practice, it is necessary to consider
ways to reduce the impact of the Hawthorne effect. Finally at the data analysis stage it is important
to avoid researcher bias and to be rigorous in the analysis of the data (either through application of
appropriate statistical approaches for quantitative data or careful coding of qualitative data).
How can reliability be improved?
In qualitative research, reliability can be evaluated through:
• respondent validation, which can involve the researcher taking their interpretation of the data
back to the individuals involved in the research and ask them to evaluate the extent to which
it represents their interpretations and views;
• exploration of inter-rater reliability by getting different researchers to interpret the same data.
In quantitative research, the level of reliability can evaluated be through:
• calculation of the level of inter-rater agreement;
• calculation of internal consistency, for example through having two different questions that
have the same focus.
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