Context Blocking in Rat Autoshaping: Sign-Tracking versus Goal-Tracking

Autor/inn/en	Costa, Daniel S. J.; Boakes, Robert A.
Titel	Context Blocking in Rat Autoshaping: Sign-Tracking versus Goal-Tracking
Quelle	In: Learning and Motivation, 40 (2009) 2, S.178-185 (8 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0023-9690
DOI	10.1016/j.lmot.2008.11.001
Schlagwörter	Stimuli; Conditioning; Animals; Food; Goal Orientation; Reinforcement; Animal Behavior + Suchen Sie Ihr Suchwort? Anreizsystem; Animal; Tier; Tiere; Lebensmittel; Zielorientierung; Zielvorstellung; Positive Verstärkung; Tierverhalten
Abstract	Prior experience of unsignaled food can interfere with subsequent acquisition by birds of autoshaped key-pecking at a signal light. This has been understood to indicate that unsignaled food results in context conditioning, which blocks subsequent learning about the keylight-food relationship. In the present experiment with rats lever insertion as the conditioned stimulus (CS) preceded sucrose delivery as the unconditioned stimulus (US). Half the rats initially received unsignaled USs in the conditioning context, while the remainder did not. Both lever-presses (sign-tracking) and magazine-entries (goal-tracking) were recorded. Under immediate reinforcement conditions, prior unsignaled US interfered with sign-tracking, but had no effect on goal-tracking. In two further groups, a trace condition prevented development of sign-tracking. In this case, prior context conditioning interfered with goal-tracking. These results suggest that interference with sign-tracking may reflect response competition, while interference with goal-tracking under trace conditions may reflect failure to acquire a CS-US association. (Contains 3 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10