At least five observers rated each target on standardized forms, and they tested inter-observer reliability by overflying non-defoliated areas, obtaining close correlation of observer visibility estimates.    From Wordnik.com.  [Operation Ranch Hand]

Concordance (inter-observer agreement) was estimated by kappa statistics testing.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

To assess inter-observer reliability, a naïve person coded 20% of the trials (= 62 trials).    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

The study instrument facilitated data collection that was feasible and with minimal inter-observer variation.    From Wordnik.com.  [BioMed Central - Latest articles] Reference