Horselenberg and colleagues (2003) conducted an experiment based on Kassin and Kieche (1996) in which participants were falsely accused of striking a computer key that caused important data to be deleted. The first study showed that 69% of the participants were willing to sign a confession that they had struck the key. In the later study, researchers changed the procedure so that in addition to signing the confession, participants were asked to give up part of their compensation for participating in the study.

Requried:
What type of study was Horselenberg’s?