Which of the following is true of the relationship between reliability and validity quizlet?
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Consider any two questions in the interview to be an example of a test-retest situation, and determine the correlation between scores given to each item in that pair; logic behind establishing reliability through internal consistency. Show Rather than select any particular pair of items, the correlations between the scores of all possible pairs of items are calculated and then averaged; this average estimates the internal consistency, the degree to which all the questions in the set are measuring the same thing. Stability across items of a selection test Ex. 3 items testing motivation. The person taking the test must receive similar scores on all 3 items, if one score is different it is considered unreliable Recommended textbook solutions
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Terms in this set (23)Validity the desired phenomena being measured Reliability how consistent is the data Research Design
a. Validity - how well can we generalize from the sample to the population Instrument a. Validity - are the things we want to measure being measures? Validity and Reliability may also be discussed in terms of.. Internal Validity or Internal Reliability Internal Validity or Internal Reliability (within the specific study or research design) External Validity or external Reliability in relation to the larger population
The relationship between reliability and validity "you can have a test that is reliable, but one that is not valid. However, you cannot have a valid test without it first being reliable. Cronbach's alpha minimum acceptable level .70 Sensitivity and Specificity This refers to the proportion of people who truly have the condition or do not have a certain condition. There are most commonly applied to the diagnostic tests. Concurrent Validity The degree of correlation with another standardized instrument. A new test may be derived secondary to decreased time and decreased cost than another validated instrument. External Validity The degree to which the results of a study can be generalized to a target population. External validity depends on the representativeness of a sample and the rigor of an experiment. Replication of a study producing consistent results increases the external validity. -Make sure sample is large enough to generalize Discriminant Validity shows the measures of constructs that theoretically should not be related to each other are, in fact, observed to not be related to each other. (i.e.: You should be able to discriminate between dissimilar constructs). *You need to show that measures that should not be related are in reality not related. Predictive Validity The level of testing or measuring instrument that can predict future performance, functioning, or behavior. For example, the Scholastic Aptitude Test (SAT) is tested for predictive validity in its ability to predict academic success in college. Predictive validity could be measured over time. Representational Validity Involves gathering evidence that the measure really assesses what it is supposed to assess. Does it tap behavior or construct as intended by its developer? If behavior is being assessed, this form of validation is synonymous with accuracy. An accurate measure, by definition, is one for which the scores are determined by the phenomenon being assessed, not something else. When a hypothetical construct is the subject matter, representational validity provides evidence that the trait or construct determines the test scores. Convergent Validity The test results should correlate highly with another measure of the same variable or construct; infer degree if agreement measuring the same trait with two different tests of the same trait or construct. Content Validity Measures how well the items represent the entire universe of items. For example, do the questions on a survey assess what you want them to assess. Content validity is established by asking an expert about the items of the survey (do they assess what you want them to assess). It is used to establish the trustworthiness of results from a test or an assessment tool Criterion-Related Validity The ability to determine performance on one test based on the performance on another test; the degree of agreement between two tests; determines the accuracy of prediction which is obtained by squaring the validity coefficient (r2), which tells us how much variance the prediction variable is able to explain. Internal Validity The quality of an experimental design such that the results obtained are attributed to the manipulation of the independent variable. In other words, if what you see is a function of what you did, then the experiment has internal validity. Validity 1. The truthfulness or accuracy within the score of a
test or interpretation of an experiment. Test-Retest Reliability A common way to determine whether a test is reliable. The same test is administered twice. The tests result in the same score. Alternate-Form Reliability Offers a solution to the problem of temporal stability. For evaluations of the type just described, it is preferable to use two different forms of the same measure. One can be administered before services are provided, and the other after they are completed. Alternate-Forms are produce by staring with a large pool of items related to the characteristics being assessed. Intra-Rater Reliability Obtaining the same results each time the same person gives the test. Recommended textbook solutions
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What is the relationship between reliability and validity quizlet?What is the difference between reliability & validity? Reliability: The test measures one and only one thing (precisely). Validity: The test measures what it is supposed to measure.
What is the relationship between validity and reliability of test?Reliability and validity are concepts used to evaluate the quality of research. They indicate how well a method, technique or test measures something. Reliability is about the consistency of a measure, and validity is about the accuracy of a measure.
Which statement is true about validity quizlet?Which statement is true about validity? When documenting reports that previous research has demonstrated the accuracy of a physiologic measure, the researcher is addressing the measures: Validity (Validity refers to the fact that the instrument measures what it says it will measure.
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