{"fact":"Crows seem to perform differently depending on the individual experimenter, suggesting personal interaction styles matter.","context":"We also detected person-specific effects on participation rates and performance. Person-specific effects on human-animal-interactions were shown in a study on dogs (Kotrschal et al., 2009).","source":"Lara Cibulski; Claudia A.F. Wascher; Brigitte M. Weiß; Kurt Kotrschal, Familiarity with the experimenter influences the performance of Common ravens (Corvus corax) and Carrion crows (Corvus corone corone) in cognitive tasks, 10.1016/j.beproc.2013.11.013","index":110}