Question

Evaluate the properties of the instrument (Survey) how would you revise or improve it and recommendations for further study.

Answer 1

The properties of the instrument (Survey) are, based on their Reliability and validity. Reliability is the ability to re.produce a result consistently, it measures the same outcome. Validity refers to the property of an instrument to measure exactly what it intended to measure and to create results that can be generalized.

An instrument should accurately and dependably measure what it ought to measure and the results must be consistent. The reliability of the survey can help you have a valid assessment, and the validity of the survey can make you confident in making a prediction.

In order to revise or improvise your Survey

Reliability

The results of the Cronbach’s alpha or the Kuder-Richardson Formula 20 computations are generally used to compute the internal consistency of the test. This can be analyzed using a reliable statistical software application.

The inter-correlations of the items in the survey and if these items measure the same construct. A construct is a behaviour researcher seeks to measure in the study. This is often the independent variable used in the study

When the inter-correlations between the items increase, the Cronbach’s alpha value will increase as well.

If the value of Cronbach ’s alpha is less than .05, the items are considered poor and must be omitted. To improvise your survey your alpha value must be above .05.

Validity

There are many ways to measure the validity of the test and there different types of validity too. The most commonly used is the construct validity. The independent variable must be accurately defined.

The construct validity is measured using factor analysis and each sub-scale has a good inter-item correlation using Bivariate Correlation. The items are considered good if the p-value must be less than 0.05.