validity

• Concurrent – where performance on one measure correlates highly with performance on another measure of the same variable.
• Ecological – where a measure of a behaviour accurately reflects the way in which the behaviour would occur in normal circumstances.
• Temporal – where findings from research that took place at a certain point in time accurately reflect the way that behaviour would occur at a different point in time.
• Face validity – where a behaviour appears at first sight (on the face of it) to represent what is being measured.