Heuristics are dynamic, not static
Stepping back from hotel booking websites, this is a reminder that heuristics are not fixed, unchanging. The context for any behavioral intervention is dynamic, operating in “a coadapting loop between mind and world.” Repeated exposure to any tactic over time educates you about its likely veracity in that context. Certain tactics (e.g., scarcity claims) in certain situations (e.g., in hotel booking websites) have been overused. Our evidence suggests their power is now diminished in these contexts.
Two questions for the future
In our study, we focused on a narrow commercial domain. It would be unwise to make blanket generalizations about the efficacy of all behavioral interventions based on this evidence alone. And yet nagging doubts remain.
#1: Like antibiotic resistance, could overuse in one domain undermine the effectiveness of interventions for everyone?
If so, the toolkit of interventions could conceivably shrink over time as commercial practitioners overuse interventions to meet their short-term goals. Most would agree that interventions used to boost prosocial behavior in sectors such as healthcare have much more consequential outcomes. In time, prosocial practitioners may be less able to rely on the most heavily used tactics from the commercial domains such as social proof and scarcity messaging.
#2 : How will the growing backlash against big tech and “surveillance capitalism” affect behavioral science?
Much of the feedback from the public relates to behavioral interventions they have seen online, not offline. Many of the strategies for which big tech companies are critiqued center on the undermining of a user’s self-determination. The public may conflate the activities of these seemingly ubiquitous companies (gathering customer data in order to predict and control behavior) with those of the behavioral science community. If so, practitioners might find themselves under much greater scrutiny.
Feedback loops matter
There probably was never an era when simple behavioral interventions gave easy rewards. Human behavior—context-dependent, and driven by a multitude of interacting influences—will remain gloriously unpredictable.
Marketers should design nudges with more than the transaction in mind, not only because it is ethical or because they will be more effective over time but also because they bear responsibility toward the practitioner community as a whole.
The lesson I take from our study? Feedback loops affect the efficacy of behavioral interventions more than we realize. Just because an intervention was successful five years ago does not mean it will be successful today. Practitioners should pay as much attention to the ecosystem their interventions operate in as their customers do. There’s no better place to start than spending time with them—talking, observing, and empathizing.
We should also consider our responsibilities as we use behavioral interventions. Marketers should design nudges with more than the transaction in mind, not only because it is ethical or because they will be more effective over time but also because they bear responsibility toward the practitioner community as a whole. We owe an allegiance to the public, but also to each other.