Question

Using an academic database (e.g. Ebsco), search for a test or scale you could use to measure their dependent variable. Read through any articles you find about the test or scale’s validity and reliability, and discuss the test or scale’s overall usefulness.

Answer 1

Test Validity and Reliability:

The validity and reliability of that test is important while a test measuring device is used as in data collection process.We are relying on the results to show support for our theory and if the data collection methods are erroneous.

Test Validity.
Validity is nothing but the degree in which our test or other measuring device. By using it we can truly measur what we intended it to measure. It becomes less valid because as it addresses some required knowledge for addition, but it does not represent all of knowledge.For example the ability to add two single digits has nothing do with history. For many constructs, or variables that are artificial or difficult to measure, it becomes more complex. Some constructs include motivation, depression, anger any human emotion or trait.

Test Reliability.
Reliability is nothing but the consistency of a test, like survey, observation. Let us condider some silly example summpose you are stepping on your bathroom scale and weighing 140 pounds only to find that your weight on the same scale changes to 180 pounds an hour later and 100 pounds an hour after that. That means any research relying on it would certainly be unreliable.Reliability coefficient is often the statistic for determining the reliability of a test. This coefficient merely represents a correlation which measures the intensity and direction of a relationship between two or more variables.

Scale Reliability is the degree to which an instrument consistently measures a construct and time points . Let us consider the most common assessments of reliability is Cronbach’s Alpha. it is a statistical index of internal consistency. There are several exceptions to this rule in the case for brief measurements when breadth of content is of primary interest in recapturing a longer scale.Most commonly assessed forms of validity include content validity, construct validity, and criterion validity. Content validity is an assessment of how well the breadth of the construct has been assessed.Construct validity is a measure of how well an instrument measures an operationalized or latent construct. construct validity include convergent and discriminant validity . TipTap Lab’s Image Selection Task (IST) is the Recreational Shopping with the original paper-and-pencil Recreational Shopping scale whhic is a example of scale reliability and validity.