A research team from Bielefeld University analysed how the body language of the potential customer helps the bartenders to identify who would like to place an order and who does not. The team found that real-life observations were at odds with the widespread belief that customers wave for signalling that they would like to order a drink.
Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...
Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...