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Rats (Rattus norvegicus) encode the shape of an array of discrete objects.
Rats were presented with a reference memory task in which they had to find water that was hidden in 1 of 4 discrete and unique objects placed at the vertices of a rectangle, and the results indicate that rats could utilize both feature and geometry cues to locate the hidden goal. Expand
Spatial navigation: Spatial learning in real and virtual environments
Humans and many non-human animals need to accurately and efficiently navigate from one place to the next in their environment. Over 3,000 years ago the volcanic islands of the Pacific were settled byExpand
Recent advances in operant conditioning technology: A versatile and affordable computerized touchscreen system
The construction of a new operant chamber that incorporates modern computer, touchscreen, and display technologies is reported, simple and inexpensive to construct but powerful and flexible enough to explore a broad range of issues in animal learning and behavior. Expand
Applying bubbles to localize features that control pigeons' visual discrimination behavior.
The results show that the Bubbles technique can be effectively applied to nonhuman animals to isolate the functional features of complex visual stimuli. Expand
Nonaccidental Properties Underlie Shape Recognition in Mammalian and Nonmammalian Vision
Training humans and pigeons to recognize four shapes reveals that a nonmammalian visual system that is different anatomically from the human visual system is also biased to recognize objects from nonaccidental statistics. Expand
Pigeons and people select efficient routes when solving a one-way "traveling salesperson" task.
The authors presented people and pigeons with a large number of 1-way traveling salesperson problems that consisted of 3, 4, and 5 identical stimuli (nodes) on a computer monitor, and the routes the pigeons and people selected were reliably more efficient than those used by a Monte Carlo model given the same problems. Expand
Finding a goal on dry land and in the water: differential effects of disorientation on spatial learning
Compared to non-disoriented rats, rats that were disoriented before testing were significantly impaired in locating a goal in a circular dry arena, but not a water tank, which constrain theoretical explanations for the differential effects of disorientation on different spatial tasks. Expand
Qualitative similarities in the visual short-term memory of pigeons and people
Although pigeons had a lower storage capacity and a higher lapse rate than humans, both species stored multiple items in short-term memory and conformed to the same basic performance model, suggesting that the functional properties of visual short- term memory are subject to similar selective pressures across these distant species. Expand
Place versus response learning revisited: tests of blocking on the radial maze.
Three experiments using associative blocking paradigms indicated that prior response learning interferes with place learning and can be used to better understand how memory systems interact during learning. Expand
The Head-Direction Signal Is Critical for Navigation Requiring a Cognitive Map but Not for Learning a Spatial Habit
It is found that despite the absence of direction-specific firing in HD cells when inverted, rats could successfully navigate to the escape hole when released from one of two familiar locations by using a habit-associated directional strategy. Expand