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Famiglia, amici, sconosciuti incrociati sui mezzi pubblici… Gli esseri umani riconoscono mediamente un numero impressionante di visi: ben 5'000, secondo uno dei primi studi sull’argomento. Lo rivela uno studio dell'Università britannica di York.
Durante la ricerca, pubblicata sulla rivista Proceedings della Royal Society, Rob Jenkins e la sua équipe del dipartimento di psicologia hanno chiesto ai partecipanti di enumerare i visi delle persone conosciute personalmente. A queste si sono aggiunti quelli di personaggi celebri riconosciuti in fotografia. Tutti sono riusciti ad identificarne un numero che va dai 1'000 ai 10'000, con una media di 5'000.
Questa cifra è la prima base per un “vocabolario dei volti umani” che potrebbe aiutare lo sviluppo di software appositi. Inoltre la ricerca potrebbe aiutare a comprendere meglio i casi di identificazione erronea. I ricercatori ipotizzano inoltre che individui allenati potrebbero teoricamente imparare a conoscere un numero di volti illimitato.
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