Robert R. Hampton

Dissociation of Memory for Order and Memory for Items by Concurrent Cognitive Load in Rhesus Monkeys ( Macaca mulatta )

Pankhuri Singhal, Victoria L. Templer, Robert R. Hampton

Memory of the order in which events occurred addresses the "when" component of episodic-like memory in animals. Seminal work demonstrated that normal rats remember the order in which they encountered odors, and hippocampal lesions selectively impaired this memory for order while leaving …

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Endorsing Nonhuman Consciousness Is Defensible Ethics but Dubious Science

Robert R. Hampton, Brooke N. Jackson

We distinguish between ethical and scientific approaches to nonhuman consciousness.Ethically, we endorse liberal inference of consciousness to mitigate moral hazard.Scientifically, we advocate for skepticism because no convincing testable causal role for consciousness in behavior has been articulated.Claims that complex behaviors necessitate consciousness …

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Metacognition and metamemory in nonhuman animals

Robert R. Hampton

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Spatial representation of magnitude in rhesus macaques: Investigating SNARC effects in quantity and size dimensions

Brooke N. Jackson, Regina Paxton Gazes, Robert R. Hampton

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Prospective and concurrent metamemory of familiarity and working memory by rhesus monkeys

Jad Nasrini, Tara Dove-VanWormer, Robert R. Hampton

Monkeys sometimes accurately predict their memory accuracy, a form of metamemory. The memory signals that support this ability may differ between memory systems and depend on when memory judgments are made. Working memory requires active maintenance through the delay interval. Familiarity allows …

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Cognitive control of memory in a food-storing and a non-storing bird species

Emily Kathryn Brown, David Francis Sherry, Robert R. Hampton

Scatter hoarding black-capped chickadees use memory to relocate hidden food, often after delays of hours or days. The ability of these birds to maintain accurate memories of the location and current status of many food caches while engaging in other distracting daily …

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Monkeys (Macaca mulatta) rank lists using multiple cognitive mechanisms simultaneously.

Rael Sammeroff, Robert R. Hampton

Memorizing the relations between items and learning relational rules are two ways in which sets of items can be ranked. We investigated the interaction of these types of learning in a series of five experiments with six adult male rhesus monkeys. We …

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Food Storing by Mexican Chickadees and Bridled Titmice

Robert R. Hampton, David Francis Sherry

Food storing is widespread but not universal in the Paridae. Worldwide, 14 species are known to store food (Sherry 1989). Two species, the Great Tit (Parus major) and the Blue Tit (P. caeruleus), are known not to store, or to do so …

Rhesus monkeys show greater habituation to repeated computer-generated images than do orangutans

Mackenzie F. Webster, Jonathan W. M. Engelberg, Robert R. Hampton

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No evidence of real-world equivalence in chickens (Gallus gallus domesticus) categorizing visually diverse images of natural stimuli presented on LCD monitors

Jad Nasrini, Robert R. Hampton

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Six adult male rhesus monkeys did not learn from the choices of a conspecific shown in videos

Jad Nasrini, Robert R. Hampton

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Rhesus monkeys manipulate mental images

Thomas C. Hassett, Victoria K Lord, Robert R. Hampton

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