000076029 001__ 76029 000076029 005__ 20190709135452.0 000076029 0247_ $$2doi$$a10.1016/j.beproc.2017.04.004 000076029 0248_ $$2sideral$$a98962 000076029 037__ $$aART-2017-98962 000076029 041__ $$aeng 000076029 100__ $$0(orcid)0000-0002-1943-340X$$aMarín Manrique, H.$$uUniversidad de Zaragoza 000076029 245__ $$aVertical string-pulling in green jays (Cyanocorax yncas) 000076029 260__ $$c2017 000076029 5060_ $$aAccess copy available to the general public$$fUnrestricted 000076029 5203_ $$aThe cognition of green jays (Cyanocorax yncas), a non Corvus corvid species, was investigated by using the string-pulling paradigm. Five adult green jays performed a vertical string-pulling task in which they had to retrieve a worm attached to the end of a vertical hanging string while sitting on their perch. In the first experiment, three of the subjects managed to retrieve the worm by pulling on the string with their beaks and stepping on the resulting loop, and thereafter repeating this sequence until the worm was accessible. When subjects were given a choice between two strings in subsequent experiments 2–4, they chose at random between the string connected to the worm and the one connected to a slice of a wooden dowel. In experiment 5, subjects that had failed the previous discrimination series were able, nevertheless, to solve a more stringent vertical string array in which they had to pull up the whole length of the string without any visual access to the worm at the end. We discuss green jays’ performance in comparison with other corvid species in which cognition has been more extensively investigated. 000076029 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/ 000076029 590__ $$a1.555$$b2017 000076029 591__ $$aZOOLOGY$$b51 / 166 = 0.307$$c2017$$dQ2$$eT1 000076029 591__ $$aPSYCHOLOGY, BIOLOGICAL$$b10 / 14 = 0.714$$c2017$$dQ3$$eT3 000076029 591__ $$aBEHAVIORAL SCIENCES$$b44 / 51 = 0.863$$c2017$$dQ4$$eT3 000076029 592__ $$a0.849$$b2017 000076029 593__ $$aAnimal Science and Zoology$$c2017$$dQ1 000076029 593__ $$aMedicine (miscellaneous)$$c2017$$dQ2 000076029 593__ $$aBehavioral Neuroscience$$c2017$$dQ3 000076029 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000076029 700__ $$aChaves Molina, A.B. 000076029 700__ $$aPosada, S. 000076029 700__ $$aColell, M. 000076029 7102_ $$14009$$2735$$aUniversidad de Zaragoza$$bDpto. Psicología y Sociología$$cÁrea Psicolog.Evolut.Educac 000076029 773__ $$g140 (2017), 74-80$$pBehav. processes$$tBEHAVIOURAL PROCESSES$$x0376-6357 000076029 8564_ $$s265802$$uhttps://zaguan.unizar.es/record/76029/files/texto_completo.pdf$$yPostprint 000076029 8564_ $$s45708$$uhttps://zaguan.unizar.es/record/76029/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint 000076029 909CO $$ooai:zaguan.unizar.es:76029$$particulos$$pdriver 000076029 951__ $$a2019-07-09-11:41:46 000076029 980__ $$aARTICLE