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128 Yale L. J. 1962 (2018-2019)
The Voluntariness of Voluntary Consent: Consent Searches and the Psychology of Compliance

handle is hein.journals/ylr128 and id is 2043 raw text is: ROSEANNA SOMMERS & VANESSA K. BOHNS
The Voluntariness of Voluntary Consent: Consent
Searches and the Psychology of Compliance
A B S T R A C T. Consent-based searches are by far the most ubiquitous form of search undertaken
by police. A key legal inquiry in these cases is whether consent was granted voluntarily. This Essay
suggests that fact finders' assessments of voluntariness are likely to be impaired by a systematic
bias in social perception. Fact finders are likely to underappreciate the degree to which suspects
feel pressure to comply with police officers' requests to perform searches.
In two preregistered laboratory studies, we approached a total of 209 participants (Experi-
encers) with a highly intrusive request: to unlock their password-protected smartphones and
hand them over to an experimenter to search through while they waited in another room. A sepa-
rate 194 participants (Forecasters) were brought into the lab and asked whether a reasonable
person would agree to the same request if hypothetically approached by the same researcher. Both
groups then reported how free they felt, or would feel, to refuse the request.
Study 1 found that whereas most Forecasters believed a reasonable person would refuse the
experimenter's request, most Experiencers-ioo out of 103 people-promptly unlocked their
phones and handed them over. Moreover, Experiencers reported feeling significantly less free to
refuse than did Forecasters contemplating the same situation hypothetically.
Study 2 tested an intervention modeled after a commonly proposed reform of consent
searches, in which the experimenter explicitly advises participants that they have the right to with-
hold consent. We found that this advisory did not significantly reduce compliance rates or make
Experiencers feel more free to say no. At the same time, the gap between Experiencers and Fore-
casters remained significant.
These findings suggest that decision makers judging the voluntariness of consent consistently
underestimate the pressure to comply with intrusive requests. This is problematic because it indi-
cates that a key justification for suspicionless consent searches - that they are voluntary - relies on
an assessment that is subject to bias. The results thus provide support to critics who would like to
see consent searches banned or curtailed, as they have been in several states.
The results also suggest that a popular reform proposal - requiring police to advise citizens of
their right to refuse consent - may have little effect. This corroborates previous observational stud-
ies that find negligible effects of Miranda warnings on confession rates among interrogees, and
little change in rates of consent once police start notifying motorists of their right to refuse vehicle
searches. We suggest that these warnings are ineffective because they fail to address the psychology
of compliance. The reason people comply with police, we contend, is social, not informational. The
social demands of police-citizen interactions persist even when people are informed of their rights.
It is time to abandon the myth that notifying people of their rights makes them feel empowered
to exercise those rights.

1962

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