Incentives increase the rate of false but not true secondary confessions from informants with an allegiance to a suspect.

One hundred ninety-two students participated in an experimental simulation testing whether incentives would reduce the reluctance of informants to implicate a close other. Half of the students were made to feel interpersonally close to a confederate who either admitted to or denied a misdeed. All students were interrogated and encouraged to sign a secondary confession stating that the confederate had confessed to the misdeed; half were offered an incentive to do so. Contrary to expectations, closeness did not induce reluctance. Instead, the offer of incentive increased the number of participants willing to sign a secondary confession implicating a close other. Further analyses revealed that this increase occurred only for false secondary confessions. Implications for interrogation practices are discussed.