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Causal Reasoning in Rats
Rats made causal inferences in a basic task that taps into core features of causal reasoning without requiring complex physical knowledge, and these competencies cannot be explained by current associative theories but are consistent with causal Bayes net theories. Expand
Two-itemsame-different concept learning in pigeons
The first successful demonstration of a simultaneous, two-itemsame-different (S/D) discrimination by 6 pigeons, in which nonpictorial color and shape stimuli were used, suggesting that the capacity to judge S/D relations is present in pigeons even when only two stimuli are used. Expand
Recovery from blocking achieved by extinguishing the blocking CS
Extinction-induced attenuation of single-phase and two-phase blocking was examined with rats in a conditioned lick-suppression task. In Experiment 1, which compared the effectiveness of single- andExpand
Beyond the Information Given
The philosopher David Hume's conclusion that causal induction is solely based on observed associations still presents a puzzle to psychology. If we only acquired knowledge about statisticalExpand
Increased amplitude and duration of acoustic stimuli enhance distraction
Extraneous sounds have a variety of effects on animals; they may interfere with communication, cause physical harm, increase wariness, influence settlement decisions, or they may cause distractionsExpand
Integration of spatial maps in pigeons
The result indicates that integration of spatial vectors acquired during phases 1 and 2 allowed the pigeons to compute a novel L→goal vector, and suggests that spatial maps may be enlarged by successively integrating additional spatial information through the linkage of common elements. Expand
Capacity and limits of associative memory in pigeons
This work reports the first empirically established limit on long-term memory use for any vertebrate species, and suggests the existence of this large exemplar-specific memory capacity has important implications for the evolution of stimulus control and for current theories of avian and human cognition. Expand
Overshadowing and latent inhibition counteract each other: support for the comparator hypothesis.
In 4 conditioned lick suppression experiments with rats, the combined effects of latent inhibition treatment followed by overshadowing treatment were assessed as a test of the comparator hypothesis's explanations of overshadowing and latent inhibition to confirm the prediction that combined latent inhibition and overshadowing treatments attenuate the response deficit produced by either treatment alone. Expand
Sensory preconditioning in spatial learning using a touch screen task in pigeons.
The authors used a touch screen-based visual-search task to investigate spatial integration in pigeons and found the peak and distribution of responses to LM X suggest that pigeons computed a novel X-goal spatial relationship on the basis of X-A and A- goal spatial vectors. Expand