Examiners tend to grade relative to work already seen, research finds

December 5, 2012

(Medical Xpress)—How well you fare on a subjective evaluation – whether it's of you treating a patient, auditioning for a play or even interviewing for a job – may depend largely on the person who was examined just before you. And the worse the person before you did, the better for you.

That sobering conclusion by University of British Columbia professor Kevin Eva resulted from a that examined whether physician-educators' grading of younger doctors could be influenced by the quality of those they had previously evaluated.

The study was one of two articles by Eva, to be published Dec. 5 in (The ).

Conducted with researchers at the University of Manchester, it asked physician educators in England and Wales to grade videos of young doctors in their first year of post-graduate training. The doctors portrayed in the videos followed scripts to represent three levels of performances – good, poor, and borderline – as they examined patients.

Some physician-educators were primed by first viewing the good performances while others viewed the poor performances. Then both groups were compared on their grading of the borderline performances.

Educators who had been primed by poor performances consistently gave better grades than those who had just watched the good performances – depending on the patient case, the grades were 30 to 100 per cent better.

"This experiment shows that judging someone's performance – whether it's clinical skills, essay-writing, or figure skating – is likely to be relative," says Eva, Director of and Scholarship in the Department of Medicine and a Senior Scientist at UBC's Centre for Scholarship.

"While such assessments are unavoidable in determining whether a student has mastered the required competencies in a field like medicine, we need to take steps to minimize contrast bias," Eva says. "It is important to ensure that there are a sufficient number of evaluations – the more data points, the more reliable the aggregate score will be."

In the second study published in the same edition of JAMA, Eva and collaborators examined the validity of multiple mini-interviews (MMIs) – a dozen, brief encounters in which applicants are asked to solve a problem through discussion with an interviewer, or through interaction with an actor or another applicant. MMIs have come to replace longer, more traditional interviews at most Canadian medical schools (including UBC's Faculty of Medicine).

The researchers found that students accepted to McMaster University, the first Canadian medical school to adopt MMIs, performed better years later on licensing examinations than students whom McMaster rejected but who were accepted at other, non-MMI schools.

Eva is an expert in the education of health professionals but he has also demonstrated how seemingly unrelated factors can affect judgment in a very different domain – men's physical attractiveness.

In 1999, he and a fellow graduate student at McMaster University asked women to view photographs and brief descriptions of men, and to rate their attractiveness on a 7-point scale. Men labeled as married had a mean attractiveness score that was 23 per cent higher than when the same men were labeled as single. As he and his collaborator wrote in CMAJ (Canadian Medical Association Journal): "Our findings do support the notion that being 'taken' influences perceptions of 'goodness."

Explore further: Bias may exist in rating of medical trainees

Related Stories

Bias may exist in rating of medical trainees

December 4, 2012
Peter Yeates, M.B.B.S., M.Clin.Ed., of the University of Manchester, United Kingdom, and colleagues conducted a study to examine whether observations of the performance of postgraduate year 1 physicians influence raters' ...

Research evaluates possible benefit of mini-interviews as part of medical school admission process

December 4, 2012
Kevin W. Eva, Ph.D., of the University of British Columbia, Vancouver, and colleagues conducted a study to determine whether students deemed acceptable through a revised admissions protocol using a 12-station multiple mini-interview ...

Study shows persistence pays off in the mating game

December 23, 2011
(Medical Xpress) -- A new study co-authored by a University of Texas at Austin psychology professor suggests that self-deception may help men succeed in the mating game, while women will benefit more from effective communication.

Recommended for you

To combat teen smoking, health experts recommend R ratings for movies that depict tobacco use

July 21, 2017
Public health experts have an unusual suggestion for reducing teen smoking: Give just about any movie that depicts tobacco use an automatic R rating.

Why sugary drinks and protein-rich meals don't go well together

July 20, 2017
Having a sugar-sweetened drink with a high-protein meal may negatively affect energy balance, alter food preferences and cause the body to store more fat, according to a study published in the open access journal BMC Nutrition.

Aging Americans enjoy longer life, better health when avoiding three risky behaviors

July 20, 2017
We've heard it before from our doctors and other health experts: Keep your weight down, don't smoke and cut back on the alcohol if you want to live longer.

Opioids and obesity, not 'despair deaths,' raising mortality rates for white Americans

July 20, 2017
Drug-related deaths among middle-aged white men increased more than 25-fold between 1980 and 2014, with the bulk of that spike occurring since the mid-1990s when addictive prescription opioids became broadly available, according ...

Parents have critical role in preventing teen drinking

July 20, 2017
Fewer teenagers are drinking alcohol but more needs to be done to curb the drinking habits of Australian school students, based on the findings of the latest study by Adelaide researchers.

Fresh fish oil lowers diabetes risk in rat offspring

July 19, 2017
Fresh fish oil given to overweight pregnant rats prevented their offspring from developing a major diabetes risk factor, Auckland researchers have found.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.