Carrie L Hanson, Chris Van Ness, Cynthia C Gadbury-Amyot, Geralyn Crain
Development and outcomes of an online-onsite hybrid dental admissions enhancement pilot program
Journal of dental education
debatable whether apes reason unobservable properties tools tested orangutans ability range tool tasks could solve using observational cues infer tool functionality experiment 1 subjects successfully chose unbroken tool broken one tools middle section hidden prevented seeing tool functional could inferred noting tools visible ends either disjointed broken tool aligned unbroken tool investigated whether success experiment 1 best explained inferential reasoning preference per se hidden tool aligned configuration conducted similar task experiment 1 included functional bent tool could arranged disjointed configuration broken tool results suggested subjects preference per se aligned tool choosing regardless whether paired broken tool functional bent tool however experiments bent tool task suggested preference result additional demands attend remember properties tools beginning task last experiment removed task demands found evidence subjects could infer functionality broken tool unbroken tool looked identical time choice