Gorilla (Gorilla gorilla gorilla) and orangutan (Pongo abelii) understanding of first- and second-order relations Jennifer Vonk Original Article 01 March 2003 Pages: 77 - 86
Nestling recognition via direct cues by parental male bluegill sunfish (Lepomis macrochirus) Bryan D. NeffPaul W. Sherman Original Article 28 March 2003 Pages: 87 - 92
Chunking versus foraging search patterns by rats in the hierarchically baited radial maze Jerome CohenSandra PardyHarold Graham Original Article 29 April 2003 Pages: 93 - 104
Salamanders (Plethodon cinereus) go for more: rudiments of number in an amphibian Claudia UllerRobert JaegerCarolyn Martin Original Article 23 April 2003 Pages: 105 - 112
Temporal landmarks: proximity prevails S. FairhurstC. R. GallistelJ. Gibbon Original Article 29 April 2003 Pages: 113 - 120
Task preparation in macaque monkeys (Macaca mulatta) Gijsbert StoetLawrence H. Snyder Original Article 30 April 2003 Pages: 121 - 130
The use of prosodic cues in language discrimination tasks by rats Juan M. ToroJosep B. TrobalonNúria Sebastián-Gallés Short Communication 01 May 2003 Pages: 131 - 136
