PSYB01H3 Chapter Notes - Chapter 5: Face Validity, Construct Validity, Psychopathy
Document Summary
Reliability refers to the consistency or stability of a measure of behavior (pg. A reliable measure does not fluctuate from one measurement instance to the next. If the measure does fluctuate, there is an error in the measurement device. Increasing reliability of a measure reduces uncertainty or error associated with that measure. The test with the least variability is more reliable. In other words, it contains less measurement error than the test that had more variability in measures. Most likely to be achieved when researchers use careful measurement procedures. Can be increased by making multiple observations of the same variable. Any measure that you make can be thought of as comprising of two components (pg. A true score the person"s real score on the variable and. Measurement error the extent that a measure of intelligence is unreliable, it contains measurement error and so cannot provide an accurate indication of an individual"s true intelligence. Most common correlation coefficient when discussing reliability.
