This paper aims to review a long-term research project exploring the chimpanzee mind
within historical and ecological contexts. The Ai project began in 1978 and was directly …

It has been 25 years since the publication of Sidman et al.'s (1982) report on the search for
symmetry in nonhuman animals. They attributed their nonhuman subjects' failure to the …

If a nonhuman animal matches the silhouette “crab”(A) to that of a “tulip”(B) and is further
taught to match “tulip”(B) to the silhouette “radio”(C), will it immediately match “radio”(C) to …

Abstract Bonobos (Pan paniscus; n= 4), chimpanzees (Pan troglodytes; n= 12), gorillas
(Gorilla gorilla; n= 8), and orangutans (Pongo pygmaeus; n= 6) were presented with 2 cups …

If subjects are taught to match Stimulus A to B and then, without further training, match B to
A, they have passed a test of symmetry. It has been suggested that nonhumans' lack of …

Chimpanzee intelligence can be studied from two very different points of view. One is the
experimental analysis of the cognitive skills of captive chimpanzees. The other is the field …

The ability to reason by exclusion (which is defined as the selection of the correct alternative
by logically excluding other potential alternatives; Call in Anim Cogn 9: 393–403 2006) is …

In a series of experiments, chimpanzees (Pan troglodytes), an orangutan (Pongo
pygmaeus), and human infants (Homo sapiens) were investigated as to whether they used …

If an organism is explicitly taught an A→ B association, then might it also spontaneously
learn the symmetrical B→ A association? Little evidence attests to such “associative …

In this paper, I advance the position that knowledge about the universals of form perceived
by the visual system is fundamental to a theory of how art communicates. I focus on how the …