Reliability

Test-retest reliability can be a useful assessment for a survey instrument. “Test-retest reliability provides information on how consistent a measure is when it is administered twice in a relatively short time frame. The appropriate length of that time frame will vary with both the instrument and the target population” (Krysik & Finn, 2013, p.266). In addition, the interval needs to be extended so that the subject cannot recall the answers and short enough to make sure that no changes occur in the variable that is being measured. If the results between the two tests are similar, the instrument has good test-retest reliability. Similar to interrater reliability, “researchers can calculate a correlation coefficient using the two set…

Psychological assessment measurements are appraised based on two key measurement constructs: reliability and validity. Reliability of an assessment denotes how consistent the test scores are after repeated executions of the assessment. The reliability of an assessment is necessary and is a foundation to build upon for validity. Validity is the second key measurement construct that deals with the degree to which “the evidence exists to support the various inferences, interpretations,…

Reliability and Validity Reliability refers to the extent to which a series of similar assessments are consistent in the result they give (Rubin & Babbie, 2010). This is a crucial aspect of carrying out tests which may be a way of testing bias as well as distortion. For instance, this can be tested in an actual situation with a DNA test. A DNA test that needs to show if a suspects DNA matches a sample at a crime scene. To ensure that the scale is reliable, the sample can be tested twice and if…

Reliability, or precision, can be defined as the degree to which a measurement is able to be reproduced with nearly the same value when evaluated several times with no change to the underlying trait being measured. Inter-rater reliability is “ the consistency with which two or more judges rate the work or performance of test takers.(Kelley & Littenberg, 2015). Reliability is often a misconstrued measurement idea. However, the reliability of a test scores bears on decisions regarding the…

Reliability Table 4.5 Reliability Test Variable Cronbach’s Alpha N of Items Remark Brand Awareness 0.825 5 Reliable Brand Association 0.757 3 Reliable Perceived Quality 0.763 4 Reliable Brand Loyalty 0.890 5 Reliable After validity test, this is the result of the reliability test. The requirement to be reliable is the Cronbach’s Alpha must be more than 0.7. As seen from the table 4.5 the Cronbach’s Alpha of every variables are more than 0.7 which are remarked as reliable. To be explained, the…

What is the importance of validity, accuracy, and reliability in behavioral measurement? Validity measurement is important, because it measures the target behavior, measures the duration of the target behavior and any questions that are directed towards that behavior. Validity also makes sure the data was tracked at appropriate times and are relevant to the target behavior(Cooper, Heron & Heward, 2007, p. 103). If none of these elements add up, then the resulted data is compromised, therefore…

Validity and Reliability of Selection Tools The four selection tools were also examined to depict their reliability and validity. Reliability can be defined as the “degree to which an assessment tool produces stable and consistent results” (Phelan & Wren, 2016). To have reliability, the selection process should be based on the same criteria. Validity is described as the amount of accuracy measured by an assessment tool (Phelan & Wren, 2016). Validity cannot exist without reliability, as it…

To answer this question, we should understand what is reliability and validity first. According to David S. (2010), objectivity and credibility are the technical terms that reliability and validity of the research refer to. Polgar, S. and Thomas, S.A. stated that accuracy of the test procedure is what validity concerned with. They also pointed out that reliability is the characteristic of reproducibility and consistency of the results of a measurement step. There are different types of test…

When discussing quality in the research it is often measured in terms of validity and reliability, these two are not independent and reliability is usually contrasted with validity. Reliability has to do with producing the same stable and consistent result each time the research is repeated. Reliability is also defined as when results are consistent over the time and an accurate illustration of subjects on the research and if the results can be produced over again under the similar methodology.…

post-concussion scores of cognition compared to baseline scores and follow-up and comparison across the control and experimental conditions, with higher scores indicating higher levels of cognition. If the test is reliable, I predict that test-retest reliability and Cronbach’s alpha will be high and positive. If the test is valid I predict that (a) individuals in the control condition will have higher levels of pre-test and follow-up test scores compared to the experimental group, and (b)…