Definition of Variation, observer

1. Bad Bugs and Their Bites Slideshow
2. Heartburn: Foods to Eat and Avoid Slideshow
3. Understanding Multiple Sclerosis Slideshow

Variation, observer: Failure by the observer to measure accurately, resulting in error.

Observer variation may be due to the observer's missing a measurement, making an incorrect measurement, or misinterpreting data.

Inter-observer variation is the amount of variation between the results obtained by two or more observers examining the same material. Intra-observer variation is the amount of variation one observer experiences when observing the same material more than once.

Need help identifying pills and medications?
Use the pill finder tool on RxList.