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For the diagnosis to be termed accurate, the features identified have to be same every time if the test is to be termed reliable. This is measured by a correlation between the two test outcomes over all the participants. This method expresses the generalisability of the test scores over different test occasions by assessing stability of the test outcomes (Hempel, 2005).
Hempel (2005) explains that this method of testing reliability varies with the type of tests, i.e. ability or traits and attitudes or states assessment. In both cases, repetitive responses based on previous memory is a high possibility thereby giving incorrect measures of reliability. Secondly, the traits tend to change with time, and this would depict low reliability measure, which is again incorrect (Garb, 2002). In such cases, the time period between the tests needs to be recorded appropriately in order to obtain accurate reliability measure. In case of validity, the test should be able to measure what is intended to be measured with minimum or no possibilities of change in behaviors. Reliability of the test decides the amount of correction and incorrect decisions that are made as an outcome of the test. Therefore, reliability is necessary for confirming validity. At the same time, validity of results obtained from this method is higher when the time gap is minimal; however, this minimum time varies with situation or behavior being
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The paper is aimed to define and to discuss the concepts of reliability and validity in the research process. These concepts are considered statistically significant in proving data in research to be able to be accepted as scientific truth. Reliability defines the high level of trust on the recorded data thus can be repeated and replicated.
In addition, writing such an assessment upfront will alleviate the potential for problems down the road. Students may, for example, become frustrated if an exam is perceived to be unfair. Much time may be spent after the exam with students questioning the very integrity of the assessment itself.
The processes involved in constructing such test items that achieve their purpose is called test development (Breiman, et al, 2009). The degree to which the test gives a total representation of all social constituent is referred to as content validity (Icove et al, 2005).
Data collection techniques are basically systematic in nature. It allows one to follow a system of conducting the research and the information gathered can be analyzed by using different models of research. A research is valid if the sources generated for data collection are reliable and are done in a systematic way.
The sampling strategy eliminates bias by offering equal chance of an individual’s selection into a sample. Randomized sampling approach also separates researchers’ interest, in a particular sample space
What one wanted to clarify was the statement asserting that: “My understanding of these contracts is that they have a purpose as a tool of knowledge that cant be actually practiced, but more used for strategic planning.” One needed more
The study conducted worldwide searches of the keywords: larval therapy, maggots, debridement, antibacterial, antimicrobial, Lucilia sericata and chronic wounds (Blueman, & Bousfield, 2012). The study also accessed literature from National Institute
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