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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1965 1
1966 1
1967 2
1970 1
1971 1
1972 1
1974 1
1975 2
1976 3
1977 8
1978 2
1979 4
1980 2
1981 4
1982 2
1983 7
1984 3
1985 4
1986 3
1987 6
1988 14
1989 11
1990 2
1991 8
1992 12
1993 7
1994 10
1995 11
1996 13
1997 20
1998 8
1999 12
2000 7
2001 12
2002 7
2003 12
2004 11
2005 8
2006 14
2007 14
2008 10
2009 8
2010 18
2011 22
2012 24
2013 25
2014 32
2015 15
2016 23
2017 24
2018 29
2019 26
2020 30
2021 31
2022 12
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554 results
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Page 1
Catalogue of bias: observer bias.
Mahtani K, Spencer EA, Brassey J, Heneghan C. Mahtani K, et al. BMJ Evid Based Med. 2018 Feb;23(1):23-24. doi: 10.1136/ebmed-2017-110884. BMJ Evid Based Med. 2018. PMID: 29367322
Observer bias is systematic discrepancy from the truth during the process of observing and recording information for a study. Many healthcare observations are at risk of this bias. Evidence shows that treatment effect estimates can be exaggerated by a third t
Observer bias is systematic discrepancy from the truth during the process of observing and recording information for a study.
Observer bias.
Poulton EC. Poulton EC. Appl Ergon. 1975 Mar;6(1):3-8. doi: 10.1016/0003-6870(75)90204-5. Appl Ergon. 1975. PMID: 15677161
Unfortunately subjective assessments suffer from two kinds of observer bias. First, the assessment selected tends to be closer than it should be to the middle of the range of available assessments. ...
Unfortunately subjective assessments suffer from two kinds of observer bias. First, the assessment selected tends to be closer …
Observer bias in randomized clinical trials with time-to-event outcomes: systematic review of trials with both blinded and non-blinded outcome assessors.
Hróbjartsson A, Thomsen AS, Emanuelsson F, Tendal B, Rasmussen JV, Hilden J, Boutron I, Ravaud P, Brorson S. Hróbjartsson A, et al. Int J Epidemiol. 2014 Jun;43(3):937-48. doi: 10.1093/ije/dyt270. Epub 2014 Jan 21. Int J Epidemiol. 2014. PMID: 24448109 Review.
Four atypical cytomegalovirus retinitis trials compared experimental oral administration with control intravenous administration of the same drug, resulting in bias favouring the control intervention, RHR 1.33 (0.98 to 1.82). ...CONCLUSIONS: Lack of blinded outcome assesso …
Four atypical cytomegalovirus retinitis trials compared experimental oral administration with control intravenous administration of the same …
Observer bias in randomized clinical trials with measurement scale outcomes: a systematic review of trials with both blinded and nonblinded assessors.
Hróbjartsson A, Thomsen AS, Emanuelsson F, Tendal B, Hilden J, Boutron I, Ravaud P, Brorson S. Hróbjartsson A, et al. CMAJ. 2013 Mar 5;185(4):E201-11. doi: 10.1503/cmaj.120744. Epub 2013 Jan 28. CMAJ. 2013. PMID: 23359047 Free PMC article. Review.
Heterogeneity was moderate (I(2) = 46%, p = 0.02) and unexplained by metaregression. INTERPRETATION: We provide empirical evidence for observer bias in randomized clinical trials with subjective measurement scale outcomes. A failure to blind assessors of outcomes in …
Heterogeneity was moderate (I(2) = 46%, p = 0.02) and unexplained by metaregression. INTERPRETATION: We provide empirical evidence for ob
Observer bias in randomised clinical trials with binary outcomes: systematic review of trials with both blinded and non-blinded outcome assessors.
Hróbjartsson A, Thomsen AS, Emanuelsson F, Tendal B, Hilden J, Boutron I, Ravaud P, Brorson S. Hróbjartsson A, et al. BMJ. 2012 Feb 27;344:e1119. doi: 10.1136/bmj.e1119. BMJ. 2012. PMID: 22371859 Review.
We also analysed rates of agreement between blinded and non-blinded assessors and calculated the number of patients needed to be reclassified to neutralise any bias. DATA SOURCES: PubMed, Embase, PsycINFO, CINAHL, Cochrane Central Register of Controlled Trials, HighWire Pr …
We also analysed rates of agreement between blinded and non-blinded assessors and calculated the number of patients needed to be reclassifie …
Evaluating observer bias and seasonal detection rates in amphibian pathogen eDNA collections by citizen scientists.
Julian JT, Glenney GW, Rees C. Julian JT, et al. Dis Aquat Organ. 2019 Apr 11;134(1):15-24. doi: 10.3354/dao03357. Dis Aquat Organ. 2019. PMID: 32132269
Using multi-scale occupancy modeling, we found no evidence to suggest the observer who collected the water sample (volunteer or PI) influenced either the probability of capturing eDNA on a filter or the probability of detecting extracted eDNA in a quantitative PCR (qPCR) r …
Using multi-scale occupancy modeling, we found no evidence to suggest the observer who collected the water sample (volunteer or PI) i …
Investigation of the clinical inter-observer bias in prostate fiducial marker image registration between CT and MR images.
Persson E, Emin S, Scherman J, Jamtheim Gustafsson C, Brynolfsson P, Ceberg S, Gunnlaugsson A, Olsson LE. Persson E, et al. Radiat Oncol. 2021 Aug 16;16(1):150. doi: 10.1186/s13014-021-01865-8. Radiat Oncol. 2021. PMID: 34399806 Free PMC article.
The purpose of this study was to investigate the potential uncertainty of gold fiducial marker (GFM) registration for localized prostate cancer and to estimate the inter-observer bias in a clinical setting. METHODS: Four experienced observers registered CT and MR im …
The purpose of this study was to investigate the potential uncertainty of gold fiducial marker (GFM) registration for localized prostate can …
Pain assessment in elderly adults with dementia.
Hadjistavropoulos T, Herr K, Prkachin KM, Craig KD, Gibson SJ, Lukas A, Smith JH. Hadjistavropoulos T, et al. Lancet Neurol. 2014 Dec;13(12):1216-27. doi: 10.1016/S1474-4422(14)70103-6. Epub 2014 Nov 10. Lancet Neurol. 2014. PMID: 25453461 Review.
Various observational-behavioural pain assessment instruments have been reported to be both reliable and valid in individuals with dementia. These techniques need to be interpreted in the context of observer bias, contextual variables, and the overall state of the i …
Various observational-behavioural pain assessment instruments have been reported to be both reliable and valid in individuals with dementia. …
Agitation.
Siddiqui W, Gupta V, Huecker MR. Siddiqui W, et al. 2022 Mar 7. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan–. 2022 Mar 7. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan–. PMID: 29630205 Free Books & Documents.
Recent recommendations from psychiatry experts are still ambiguous and often confounded by observer bias. Aggression can be verbal or physical and is directed at objects and other people, and sometimes may manifest as self-mutilation. ...
Recent recommendations from psychiatry experts are still ambiguous and often confounded by observer bias. Aggression can be ve …
554 results