{"fact":"Crows, like children, might be influenced by how reliable they perceive an experimenter to be when deciding whether to wait for a better reward.","context":"In a similar delayed gratification task children considered experimenter reliability when deciding whether to consume a small reward instantly or wait for a larger reward (Kidd et al., 2013). Thus, the birds’ behaviour in the exchange task could also be affected by whether they consider the experimenter to be a reliable exchange partner.","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":109}