12 luglio 2012

Occhi rivelatori? Uno studio smentisce la credenza.

I movimenti oculari rivelano se stiamo mentendo o siamo sinceri? Secondo una credenza spostare lo sguardo verso sinistra sarebbe indicativo del dire la verità, mentre guardare a destra indicherebbe una bugia. Uno studio, pubblicato ieri su PLoS ONE, smentisce questa impostazione, fatta propria da chi si occupa di programmazione neurolinguistica. Richard Wiseman (University of Hertfordshire, UK) e Caroline Watt (University of Edinburgh, UK) hanno filmato un gruppo di volontari giungendo a correlare i loro movimenti oculari con le corrispondenti risposte al test. I risultati dello studio non hanno rivelato alcuna relazione tra le menzogna e i movimenti

Wiseman R, Watt C, ten Brinke L, Porter S, Couper S-L, et al. The Eyes Don’t Have It: Lie Detection and Neuro-Linguistic Programming. PLoS ONE 7(7): e40259. doi:10.1371/journal.pone.0040259 Abstract Proponents of Neuro-Linguistic Programming (NLP) claim that certain eye-movements are reliable indicators of lying. According to this notion, a person looking up to their right suggests a lie whereas looking up to their left is indicative of truth telling. Despite widespread belief in this claim, no previous research has examined its validity. In Study 1 the eye movements of participants who were lying or telling the truth were coded, but did not match the NLP patterning. In Study 2 one group of participants were told about the NLP eye-movement hypothesis whilst a second control group were not. Both groups then undertook a lie detection test. No significant differences emerged between the two groups. Study 3 involved coding the eye movements of both liars and truth tellers taking part in high profile press conferences. Once again, no significant differences were discovered. Taken together the results of the three studies fail to support the claims of NLP. The theoretical and practical implications of these findings are discussed.

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