28th International Congress of Psychology August 8 ... - U-netSURF

crowding procedure could sensitized morphine psychomotor effect as a whole, and this effect was
only evident for HR but not LR rats. The individual differences toward morphine psychomotor
effects was indiscernible in rats housed in normal social conditions and only turned out to be
significant under stress conditions, indicating co-contribution of congenital and environment
elements to the occurrence of addictive behavior.
1080.2 Food caching by western Scrub-Jays: A case of prospective cognition? Anthony
Dickinson, Joanna Dally, James Gilbert, Nicola Clayton, University of Cambridge, UK
The mental time travel hypothesis posits that only humans can travel backwards in time to
re-experience and recollect specific past events (retrospective cognition: episodic memory) and
travel forward in time to anticipate future needs (prospective cognition: future planning). Our
studies of food caching by Western Scrub-Jays challenge the prospective component of this
hypothesis by demonstrating that caching is sensitive the past states of the caches at recovery. The
jays reduced their caching of food items that were either degraded or pilfered at recovery and
increased their caching of the non-degraded and non-pilfered food items.
1080.3 Environmental knowledge and use of landmarks by capuchins (Cebus apella), Patrizia
Potì 1 , Martina Saporiti 2 , Paola Bartolommei 3 , 1 Istituto di Scienze e Tecnologie della
Cognizione, Italy; 2 Università La Sapienza, Roma, Italy; 3 Università La Sapienza, Roma, Italy
In two experiments three capuchins were trained to find a food reward hidden midway between
two landmarks with the landmark configuration translated and/or rotated across trials. After
reaching a criterion, the capuchins received probing trials with the landmark configuration
expanded and no reward: they searched at the training distance from each landmark and followed
other environmental cues for search direction. In a third experiment with another capuchin the
same training landmark configuration was only translated but two inter-landmark distances were
used. During expansion trials the subject did not adjust to the new distance. Capuchins use
landmarks, but not configurationally.
1080.4 Perception of transport risks in the Norwegian Public, Björg-Elin Moen 1 , Torbjørn
Rundmo 2 , 1 Dept. of Psychology, Norway; 2 Norwegian University of Science and Technology,
Trondheim, Norway
The aims of this paper are to examine the associations between probability judgements, risk
tolerance and demand for risk mitigation related to various types of transport a representative
sample of the Norwegian public and analyse the relation between probability assessments,
evaluation of consequences, and demand for risk mitigation. Contrary to what is argued on the
basis of previous studies the present study shows that it is the consequences rather than the
probability which is important for demand of risk mitigation. There was also an association
between judgement of consequences and affect and affect was related to risk mitigation.
1080.5 Numerousness judgments by chimpanzees and humans: Evidence of a shared
mechanism for estimation, Michael Beran, Mary Beran, Lauren Taglialatela, David
Washburn, Georgia State University, USA
We have shown that chimpanzees represent numerosity approximately in a manner best described
as estimation. When chimpanzees make judgments of sequentially presented sets of items,
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