Cronbach Alpha 0 6 Acceptable

Very high reliability 0 95 or higher is not necessarily desirable as this indicates that the items may be entirely redundant.

Cronbach alpha 0 6 acceptable. Tau equivalent reliability is a single administration test score reliability i e the reliability of persons over items holding occasion fixed coefficient commonly referred to as cronbach s alpha or coefficient alpha. Acceptable 0 6 α 0 7. Excellent 0 8 α 0 9. Most items appeared to be worthy of retention resulting in a decrease in the alpha if deleted.

α a reliability analysis was carried out on the perceived task values scale comprising 8 items. α 0 9 excellent 0 7 α 0 9 good 0 6 α 0 7 acceptable 0 5 α 0 6 poor α 0 5 unacceptable where do. However as noted by lance butts and michels 2006 this norm is misleading. Cronbach s alpha showed the questionnaire to reach acceptable reliability α 0 81.

Is the most famous and commonly used among reliability coefficients but recent studies recommend not using it unconditionally. If cronbach s alpha for some subsets falls below 0 7 normally the decision is to delete the relevant question in the subset in order to increase the cronbach s alpha above 0 7. Cronbach s alpha gives us a simple way to measure whether or not a score is reliable. If cronbach s alpha for some subsets falls below 0 7 normally the decision is to delete the relevant question in the subset in order to increase the cronbach s alpha above 0 7.

This is derived from the work of nunnally 1978. It is used under the assumption that you have multiple items measuring the same underlying construct. Cronbachs alpha is reported using the small greek letter alpha. So for the happiness survey you might have five questions all asking different things but when combined could be said to measure overall happiness.

It seems fairly common to describe cronbach s alpha values as follows. A commonly accepted rule of thumb is that an alpha of 0 7 some say 0 6 indicates acceptable reliability and 0 8 or higher indicates good reliability. Note that a reliability coefficient of 70 or higher is considered acceptable in most social science research situations hand calculation of cronbach s alpha. Cronbach s alpha internal consistency 0 9 α.

A frequently cited acceptable range of cronbach s alpha is a value of 0 70 or above. Questionable 0 5 α 0 6.