The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).

Descriptor ID	D015588
MeSH Number(s)	E01.354.753 N02.421.450.600 N05.715.350.150.675 N06.850.490.500.250 N06.850.490.750
Concept/Terms	Observer Variation Observer Variation Observer Variations Variation, Observer Variations, Observer Bias, Observer Observer Bias Intraobserver Variation Intraobserver Variation Intraobserver Variations Variation, Intraobserver Variations, Intraobserver Intra-Observer Variation Intra Observer Variation Intra-Observer Variations Variation, Intra-Observer Variations, Intra-Observer Intraobserver Variability Intraobserver Variabilities Variabilities, Intraobserver Variability, Intraobserver Intra-Observer Variability Intra Observer Variability Intra-Observer Variabilities Variabilities, Intra-Observer Variability, Intra-Observer Interobserver Variation Interobserver Variation Interobserver Variations Variation, Interobserver Variations, Interobserver Inter-Observer Variation Inter Observer Variation Inter-Observer Variations Variation, Inter-Observer Variations, Inter-Observer Interobserver Variability Interobserver Variabilities Variabilities, Interobserver Variability, Interobserver Inter-Observer Variability Inter Observer Variability Inter-Observer Variabilities Variabilities, Inter-Observer Variability, Inter-Observer

Below are MeSH descriptors whose meaning is more general than "Observer Variation".

Below are MeSH descriptors whose meaning is related to "Observer Variation".

Below are MeSH descriptors whose meaning is more specific than "Observer Variation".