Reliability and validity are important aspects of selecting a survey instrument. Reliability refers to the extent that the instrument yields the same results over multiple trials. Validity refers to the extent that the instrument measures what it was designed to measure. In research, there are three ways to approach validity and they include content validity, construct validity, and criterion-related validity. Show
Content validity measures the extent to which the items that comprise the scale accurately represent or measure the information that is being assessed. Are the questions that are asked representative of the possible questions that could be asked?  Discover How We Assist to Edit Your Dissertation ChaptersAligning theoretical framework, gathering articles, synthesizing gaps, articulating a clear methodology and data plan, and writing about the theoretical and practical implications of your research are part of our comprehensive dissertation editing services.
Construct validity measures what the calculated scores mean and if they can be generalized. Construct validity uses statistical analyses, such as correlations, to verify the relevance of the questions. Questions from an existing, similar instrument, that has been found reliable, can be correlated with questions from the instrument under examination to determine if construct validity is present. If the scores are highly correlated it is called convergent validity. If convergent validity exists, construct validity is supported. Criterion-related validity has to do with how well the scores from the instrument predict a known outcome they are expected to predict. Statistical analyses, such as correlations, are used to determine if criterion-related validity exists. Scores from the instrument in question should be correlated with an item they are known to predict. If a correlation of > .60 exists, criterion related validity exists as well. Reliability can be assessed with the test-retest method, alternative form method, internal consistency method, the split-halves method, and inter-rater reliability. Test-retest is a method that administers the same instrument to the same sample at two different points in time, perhaps one year intervals. If the scores at both time periods are highly correlated, > .60, they can be considered reliable. The alternative form method requires two different instruments consisting of similar content. The same sample must take both instruments and the scores from both instruments must be correlated. If the correlations are high, the instrument is considered reliable. Internal consistency uses one instrument administered only once. The coefficient alpha (or Cronbach’s alpha) is used to assess the internal consistency of the item. If the alpha value is .70 or higher, the instrument is considered reliable. The split-halves method also requires one test administered once. The number of items in the scale are divided into halves and a correlation is taken to estimate the reliability of each half of the test. To estimate the reliability of the entire survey, the Spearman-Brown correction must be applied. Inter-rater reliability involves comparing the observations of two or more individuals and assessing the agreement of the observations. Kappa values can be calculated in this instance. InfoSci-OnDemand Download Premium Research Papers Full text search our database of 171,400 titles for Validity to find related research papers. Learn More About Validity in These Related TitlesCopyright 2021. 355 pages. There is very little discussion of socially just a... In Stock Copyright 2020. 1356 pages. In the past, individuals in the dentistry field ha... In Stock Copyright 2020. 322 pages. Business intelligence supports managers in enterpr... In Stock Copyright 2020. 539 pages. The world is witnessing a media revolution similar... In Stock Copyright 2017. 345 pages. Police psychology has become an integral part of p... In Stock Copyright 2016. 622 pages. While freedom of speech is a defining characterist... In Stock Copyright 2015. 973 pages. Modern medicine is changing drastically as new tec... In Stock Copyright 2015. 403 pages. The model minority stereotype is a form of racism... In Stock Copyright 2014. 465 pages. Online communities continue to evolve as more peop... In Stock Copyright 2003. 384 pages. Enterprise evolution (or electronic enterprise) is... In Stock What is the degree to which an instrument is intended to measure?Validity refers to the degree to which an instrument accurately measures what it intends to measure.
Which of the following refers to whether a measurement instrument accurately measures what it is supposed to measure?Validity can be considered as the extent to which a measurement, test, or study measures what it purports to measure.
What intends to measure what is intend or claims to measure?Hence, it could be concluded that a test that measures what it intends to measure is called validity. Other qualities of a test: Reliability: One of the most important criteria for the quality of measurement is the reliability of the measuring instrument.
Is the degree of consistency or accuracy with which an instrument measure the attributes it is designed to measure?Reliability refers to degree of consistency or accuracy with which an instrument measures for which it is designed to measure.
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Refers to the degree to which an instrument accurately measures what it intends to measure
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