We investigated how telling different types of lies may impact memory. Participants studied pictures of objects, and later lied and told the truth about these and new objects once or multiple times by describing them or by denying they had seen them. Forty-eight hours later, participants were tested on their source memory. Results revealed that participants had good memory for having falsely described a never-seen object, but relatively poor memory for having falsely denied seeing a studied object. These results suggest that telling certain types of lies may make a person more likely to forget having lied. In addition, repeated truthful denials of having seen a picture paradoxically increased false memories for having seen it. Thus, telling the truth does not always prevent the possibility of memory distortion.
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