The next generation of research on implicit bias in health care must accomplish three goals: 1) determine the degree of different implicit biases for different groups; 2) assess the associations among implicit bias and processes and outcomes of care; 3) test interventions to reduce implicit bias in health care and outcomes, if bias is found to be important in health care. In this section we expand on these three goals and highlight potential approaches to accomplish them.
Goal 1: Determine the degree of implicit bias with regard to the full range of social groups for which disparities exist
Health disparities have been shown along multiple social dimensions
22–25 (eg, race/ethnicity, gender, age and SES) and local circumstances may bring additional dimensions to the forefront (eg, military or religious groups). Research is needed to determine whether implicit bias exists toward each of these groups. In some cases, the approach used in existing research can be easily adapted. For example, an IAT has already been developed to assess bias against elderly vs young individuals.
26 In other cases, additional research is needed to determine what types of bias might be operating. This is likely to be particularly important with regard to gender. Research shows that people are more often implicitly biased
in favor of women over men,
27,28 so why does it appear that in some situations women are less likely to receive high-quality care? An even greater challenge will be the consideration of overlapping group biases. Patients are not simply members of a racial/ethnic group, a gender group,
or an age group; they are simultaneously members of all these groups. The interaction among biases for or against these groups is relatively unexplored. In our earlier example, the care provided to an elderly African American by a clinician with biases against both social groups may be of lower quality, whereas implicit bias
in favor of the elderly may offset some of the effects of implicit bias against African Americans. As millions of newly insured individuals prepare to enter the health care system under health care reform legislation during the next few years, the interaction of socioeconomic bias and other forms of bias (eg, SES by race) will require particular attention.
The extent to which implicit bias exists among different groups of health care professionals (eg, physicians, nurses, front-office staff), with regard to patients from different social groups must also be more fully understood. As shown in
Table 1, the few studies of implicit bias in health care have focused primarily on physicians. In an environment in which care is increasingly provided by multidisciplinary teams, it is important to assess the biases of the entire range of health care professionals. A bad health care experience may come from poor service in the pharmacy or on a phone call with front-desk staff. Furthermore, little research has addressed the implicit biases that patients themselves bring to clinical encounters (eg, bias against a clinician of different race/ethnicity or with a foreign accent). Given evidence that racial, ethnic, or gender concordance between clinician and patient can affect communication and treatment,
29–31 the implicit biases of patients, particularly in combination with those of their clinicians, need further study. Finally, research on implicit bias ought to be broadened to include health care beyond the US and in different cultures.
Goal 2: Understanding the relations between implicit bias and clinical outcomes
The second step is to test and refine the conceptual model presented earlier that describes how implicit bias might be related to the processes and outcomes of clinical care. As shown in
Figure 1, the relevant processes of care necessary to achieve clinical goals also require assessment if we are to understand the mechanisms through which implicit bias affects those goals. Decisions or behaviors by either clinician or patient may suggest that implicit biases are at work. In our earlier example, both clinician-determined processes, such as the decision to prescribe an additional antihypertensive medication, and patient processes, such as the decision to adhere to that new drug, need to be assessed. The quality of communication between clinician and patient is also important to assess. If implicit bias is found to be expressed through simple aspects of communication such as speed of speech or body positioning, specific training for clinicians may be suggested. Insight may also be gained by stratifying analyses of current measures of patient satisfaction with clinicians by patient characteristics such as race and ethnicity.
32 There are also sophisticated analytic systems for coding audio-taped or videotaped encounters, that consider both the content and style of communication.
33,34Assessing the relation between implicit bias and outcomes is critical. In statistical terms, one needs to go beyond the demonstration of a main effect such as a health disparity between Latinos and whites, and determine whether differences in the levels of disparity found from one clinician to another co-vary with differences in levels of the clinicians' bias.
To refine the simplistic causal model shown in
Figure 1, both laboratory and clinical studies are needed. In laboratory studies, implicit bias is most likely to have an effect in situations with substantial ambiguity, room for “judgment calls,” and constraints on time and attention.
14,35 Translated to the clinical setting, implicit bias may be more influential when treatment algorithms are less developed than in situations that have clearly defined algorithms for treatment. Likewise, implicit bias may have more of an effect on decisions made during a one-time visit than on decisions made in the context of an ongoing clinical relationship in which one presumes more accurate patient data has accumulated. On the other hand, laboratory research has not examined implicit bias in long-term relationships, and the possibility exists that such bias may have a cumulative effect with early instances of miscommunication building into larger problems later on.
Goal 3: Interventions to reduce effects of implicit bias on processes of care and clinical outcomes
If implicit biases are found to be important in health care, the third step is to adapt and test theory-based interventions
36–38 at all levels, including the individual practitioner, the care team, and the delivery system. Such interventions could attempt to reduce implicit bias directly, could bolster patients' defenses against bias, or could alter care delivery systems to mitigate the effects of bias.
The most obvious point of intervention is with the individual. If health care professionals' implicit biases are contributing to disparities, reducing those biases seems an obvious solution. Basic research on implicit bias supports the plausibility of this approach by showing that implicit bias is potentially malleable, changing in response to situational cues and norms.
36 Despite its intuitive appeal, a direct approach of confronting an individual with evidence of bias may actually have little effect on that bias. Although people can be rationally convinced that they ought to feel or think differently and they are motivated to do so, the operation of implicit bias is not open to easy identification and effortful control. Indeed, research shows that intentionally trying to suppress bias may actually make it “rebound” at a later time.
39 Instead a less direct approach can be more effective.
If one thinks of implicit bias in psychological terms as an automatic cue-response association, then one might see that changing the cue is likely to be more effective than trying to will the response to change
36—at least in the short term. The challenge then, becomes identifying cues or situational variables that matter. Laboratory research suggests that implicit bias can be diminished by cues that bring to mind associations that run counter to the bias.
4,40–42 To illustrate, one study found that white individuals who had been exposed to many admired African Americans, subsequently showed reduced implicit bias.
42 Such methods need to be adapted and tested in clinical settings, but they nonetheless suggest the real possibility of change.
In addition to direct intervention on health care professionals' implicit bias, the conceptual model shown in
Figure 1 makes it clear that there are many pathways between implicit bias and health outcomes, with the possibility of intervention at each one. Patients play a role in the quality of the clinical interaction and successful treatment is often reliant on their own efforts. Patients may respond to bias in a variety of ways, some of which can worsen the situation and some of which can help to deflect a negative outcome.
Recent research on stereotype threat and, importantly, the positive effects of a self-affirmation intervention hold great promise. Stereotype threat
43 is a stressful psychological state that occurs when a person fears being judged by others on the basis of negative stereotypes. In health care settings, stereotype threat may impair patient-clinician communication, reduce self-efficacy, and increase mistrust.
44 Because stereotype threat can impair communication between patient and physician, interventions that reduce patients' perception of threat might lead to more functional behavior for both patients and physicians. Self-affirmation, a process in which people affirm their self-integrity (eg, important values) in the face of a threat, has been shown in educational settings to reduce racial differences in performance over time periods of up to two years.
45–47 Self-affirmation thus represents a possible component of a theory-driven intervention to reduce the impact of implicit bias in health care. Studies to assess this are in progress.
If one thinks of implicit bias in psychological terms as an automatic cue-response association, then one might see that changing the cue is likely to be more effective than trying to will the response to change36 …
Of course, interventions at the team, clinic, or delivery system level can also reduce health care disparities. Such interventions are primarily organizational in nature, and, despite their great potential, are beyond the scope of this discussion.