Assignment Writing Help on Determining Validity and Reliability

Determining Validity and Reliability

It is important for the reliability and validity of the data collection process used in a research to be determined. The validity of an investigation method is associated with the degree with which the method involved in a research measures the intended variables. Reliability, conversely, is associated with the consistency of a measuring device, test, observations, or a survey.

Processes used to Determine Validity

The variables in a research may be categorized into two; that is, those that are measurable and those that are difficult to measure due to their complexity. There are various construct validity processes used in research; they include “concurrent validity”, “predictive validity”, and “content validity”. Concurrent validity defines the measuring instrument ability to vary directly with respect to a similar variable or vary indirectly with respect to an opposing variable. This test involves the comparison of results obtained in a test with the results from an already verified test. An example of a concurrent validity test would involve the determination of an Adults intelligence, which can be compared with the Wechsler Adult intelligent scale. The Wechsler Adult intelligent scale is a verified test for measuring the human intelligence.

The content validity test is aimed at determining the ability of a variable to be all-inclusive. In the test of human intelligence, the ability of a valuable to incorporate the reasoning, verbal, analytical ability, and any other aspect that pertain to human intelligence must be considered for it to satisfy the content validity test. The content validity test is often carried out by experts. The predictive validity test, on the other hand, is used to forecast the future behavior of a research methodology or device. The self-assessment tests used in learning institutions are used as a tool of predicting the future students’ grades and performance.

Processes used to Determine Reliability

The different types of reliability tests include reliability coefficient, test-retest reliability, parallel form reliability, and the inter-rater reliability. The reliability coefficient determines the connection between, or among, identified variables. The test-retest reliability determines the consistency between various administrations. The parallel form reliability test is used to determine the consistency of different administrations under a common scale. The inter-rater reliability test is used to correlate observations of the same variable by two observers to determine their reliability.