the psychology of lying and exaggerating

A very interesting article from the ironically-named Benedict Carey in the NYT (hat tip: Linda Christiansen) on a distinction in the academic literature on different types/degrees of lying...

Some tales are so tall that they trip over their own improbable feats, narrative cracks and melodrama. That one-on-one playground victory over Kobe Bryant back in the day; the 34 hours in labor without painkillers; the former girlfriend or boyfriend who spoke eight languages and was a secret agent besides....

Yet in milder doses, self-serving exaggeration can be nearly impossible to detect, experts say, and there are several explanations.

A series of recent studies, focusing on students who inflate their grade-point average, suggests that such exaggeration is very different psychologically from other forms of truth twisting. Touching up scenes or past performances induces none of the anxiety that lying or keeping secrets does, these studies find; and embroiderers often work to live up to the enhanced self-images they project. The findings imply that some kinds of deception are aimed more at the deceiver than at the audience, and they may help in distinguishing braggarts and posers from those who are expressing personal aspirations, however clumsily.

"It's important to emphasize that the motives driving academic exaggeration seem to be personal and 'intrapsychic' rather than public or interpersonal," said Richard H. Gramzow, a psychologist at the University of Southampton in England who has led much of the research....

Psychologists have studied deception from all sides and have found that it usually puts a psychological or physical strain on the person doing the dissembling. People with guilty knowledge — of a detail from a crime scene, for example — tend to show signs of stress, as measured by heart and skin sensors, under pointed questioning....

But a study published in February in the journal Emotion found that exactly the opposite was true for students who exaggerated their grades....found that almost half had exaggerated their average by as much as six-tenths of a point. Yet the electrode readings showed that oddly enough, the exaggerators became significantly more relaxed while discussing their grades....

The grade inflation was less an attempt to deceive, the authors concluded, than a reflection of healthy overconfidence and a statement of aspirations. "It's basically an exercise in projecting the self toward one's goals," Dr. Gramzow said.

In earlier studies, Dr. Gramzow and Dr. Willard found that students who bumped up their averages in interviews subsequently improved their grades — often by the very amount they had exaggerated....