Before revision: represents the number of items in the measure the variance associated with each item i the variance associated with the total scores Alternatively, it can be calculated through the following formula: where represents the average variance represents the average inter-item covariance.
After revision: where::represents the number of items in the measure the variance associated with each item i the variance associated with the total scores Alternatively, it can be calculated through the following formula: where represents the average variance represents the average inter-item covariance.