Is that fear? Domestic dogs' use of social referencing signals from an unfamiliar person

The aim of this study was to investigate whether dogs could successfully interpret a 'social referencing' cue (either happiness or fear) toward an object after viewing a human emotional expression. Fearful expressions are more likely to be unfamiliar to dogs, and thus they may not understand the meaning of such expressions. When confused, dogs could avoid contact with an object as in Merola et al., 2012, Merola et al., 2011. The present study compared an experimenter's fearful or happy response when an ambiguous object appeared with a control condition (experimenter was confusing). We examined 114 dogs in one of three conditions; happiness, fearful and the control. We found that dogs were more attentive to the experimenter when she displayed the fearful and control expressions compared to when happy, with no difference between the control and fear conditions. When left alone with the toy, they showed a similar pattern - more interest in the toy in both the fearful and control conditions. Our findings suggest that dogs may not understand the cues in the fearful and control conditions and instead respond with a possible attempt to gain more information from the experimenter.