PSYASS 2 - 5 Reliability

Reliability (in everyday conversations)

synonym of dependability or consistency

Reliability (in psychometrics)

refers to consistency in measurement

Measurement Error

refers to the inherent uncertainty associated with any measurement, even aftercare has been taken to minimize preventable mistakes

Error (in everyday usage)

usually refers to a mistake of some sort that could have been prevented had a person been more conscientious, more skilled or better informed

Error (in psychometrics)

refers to both preventable mistakes and to aspects of measurement imprecision that are inevitable