Tom Brady is no stranger to pain (source) |
This week in SWAG we read an article about racial biases
in perceptions of others’ pain. The American medical field has a long history
of racial bias (Note: I think if you switched the words “medical field” with
almost any other field, the sentence would be factually accurate. For example,
“mathematics field” or “psychology field” but not “magnetic field”). American
blacks tend to be diagnosed less accurately by medical staff than whites, to
receive less optimal health care, and to be cared for less intimately. The
authors, led by Sophie Trawalter of the University of Virginia, wondered about
the source of this racial bias. They reasoned that it might arise in part from
a belief that low status groups experience less pain than other groups in
society. Blacks and other traditionally low status groups in America are
perceived as having overcome greater hardships throughout their lives. As a
result of contending with, and overcoming these hardships, low status groups
are perceived to experience less pain than their more advantaged counterparts—their
tough circumstances have made them tougher. This racial bias in pain perception
is theorized to underlie the black-white treatment gap in medicine.
The authors tested this pain perception bias in an
interesting way: In the first study, the authors examined injury reports made
by the NFL. Injury reports are the fixation of fantasy football armchair
quarterbacks everywhere, and they are frustrating largely because there is a
great deal of error in how different teams report injuries for specific
players. Teams categorize players with increasing levels of play likelihood
based on a reported injury—with players labeled as “probable” more likely to
play than players labeled as “questionable” or “doubtful.” The severity of team
reported injuries is surprisingly independent from whether a player actually
plays the following week. The authors wondered if there exists racial bias in
the errors in these NFL injury reports such that black players are reported as
more probable than their white counterparts, despite having the same injury.
Examining injuries that ranged from lacerations, to knee
injuries, to stingers the authors found evidence for race bias in NFL injury
reports: Specifically, black players were categorized as more probable than
their white counterparts despite having the same type of injury.
In the remaining experiments, the authors sought causal
evidence that race influences pain perception bias. They presented participants
with a number of black and white faces that were pretested to be rated as
similar on a number of attributes (e.g., emotion expression), and then asked
participants about how much pain the target in the photograph would experience
during a list of physical injuries like “having a tooth pulled.” The authors
found that black faces elicited perceptions of reduced pain relative to their
white counterparts to the same physical injuries.
In the final experiment, the authors attempted to link
this racial bias in pain perception to social status. Participants were asked
to imagine a person in a photograph (manipulated to be either black or white)
who was low status, equal status, or high status within one’s workplace, and
then to judge that person’s pain experience for the same list of physical
injuries. In this analysis, status captured all the variance in pain
perception: Imagined low status targets were perceived to experience
significantly less pain than high status targets, presumably because low status
individuals have overcome more hardships throughout their lives, and are
tougher as a result.
I think SWAG enjoyed reading this article. One of the nice things about it is that it attempts to do what is the main goal of social psychology in my view—examine a phenomenon like racial bias in medicine with the goal of uncovering the specific reason(s) why this bias occurs. Testing the phenomenon with actual NFL injury data that both real athletes and armchair athletes care about is another positive because it engages a real issue with implications for the health of real individuals. Race bias in NFL injury reporting could put some black NFL players at greater risk of sustaining worse injuries or exacerbating existing ones.
SWAG had some questions about the data analyses
throughout the studies—for instance, it’s not clear how the researchers
analyzed the NFL data (Note: Because the study was published in PLOS one and
the journal allows post publication comments, I went ahead and asked the
authors about providing more data analysis details. I hope this will generate a
response!). Still, it was exciting work and we couldn’t help but think up a
number of different experiments to follow those presented in the paper. The
article made us all excited about social psychology… and donut holes… the jelly
filled ones in particular.
Trawalter S, Hoffman KM, & Waytz A (2012). Racial bias in perceptions of others' pain. PloS one, 7 (11) PMID: 23155390
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