The Alpha Coefficient, often referred to as Cronbach's Alpha, is a statistical measure used to assess the reliability or internal consistency of a set of items in a survey or test. It indicates how closely related a group of items are as a collective measure of a single construct. Values range from 0 to 1, with higher values suggesting greater reliability. A commonly accepted threshold for good reliability is an Alpha Coefficient of 0.70 or above. This means that the items in the test or survey are measuring the same underlying concept effectively. Lower values may indicate that the items are not well correlated, suggesting potential issues with the measurement tool.