is the most common form of internal consistency reliability coefficient. By convention, a lenient cut-off of 0.60 is common in exploratory research, alpha should be at least 0.70 or higher to retain an item in an "adequate" scale and many researchers require a cut-off of 0.80 for a "good scale". It can be interpreted as the correlation of the observed scale with all possible other scales measuring the same thing and using the same number of items.