A psychologist developed a questionnaire on employee ‘Green behaviour’, what would be the correct sequence in the context of this tool development?

(a) Identifying the discrimination index of the items
(b) Calculation of Cronbach alpha
(c) Developing a standard score norm
(d) Confirmatory factor analysis
(e) Exploratory factor analysis

Correct option is D

Identifying the discrimination index of the items (A): Initially, it's important to assess how well each item distinguishes between high and low scorers on the construct being measured. This is the first step in ensuring that the items are meaningful and contribute effectively to the overall measurement.

Calculation of Cronbach alpha (B): Next, we calculate Cronbach’s alpha, a measure of internal consistency or reliability, which helps determine whether the items are consistently measuring the same construct. A high Cronbach alpha indicates reliable items.

Exploratory factor analysis (E): After checking the discrimination index and assessing internal consistency, we perform exploratory factor analysis. This method helps identify the underlying dimensions or factors that the questionnaire is measuring. It's an essential step in understanding the structure of the data.

Confirmatory factor analysis (D): After the exploratory phase, confirmatory factor analysis is conducted to confirm the factor structure. This step tests the hypothesized model and ensures that the factors identified are valid and appropriate for the tool.

Developing a standard score norm (C): Finally, after confirming the factor structure and ensuring the reliability and validity of the tool, we develop standard score norms. These norms allow scores to be interpreted meaningfully, often in relation to a reference group.