1. 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

   

2. Nestling recognition via direct cues by parental male bluegill sunfish (Lepomis macrochirus)

   • Bryan D. Neff
   • Paul W. Sherman

   Original Article 28 March 2003 Pages: 87 - 92

   

3. Chunking versus foraging search patterns by rats in the hierarchically baited radial maze

   • Jerome Cohen
   • Sandra Pardy
   • Harold Graham

   Original Article 29 April 2003 Pages: 93 - 104

   

4. Salamanders (Plethodon cinereus) go for more: rudiments of number in an amphibian

   • Claudia Uller
   • Robert Jaeger
   • Carolyn Martin

   Original Article 23 April 2003 Pages: 105 - 112

   

5. Temporal landmarks: proximity prevails

   • S. Fairhurst
   • C. R. Gallistel
   • J. Gibbon

   Original Article 29 April 2003 Pages: 113 - 120

   

6. Task preparation in macaque monkeys (Macaca mulatta)

   • Gijsbert Stoet
   • Lawrence H. Snyder

   Original Article 30 April 2003 Pages: 121 - 130

   

7. The use of prosodic cues in language discrimination tasks by rats

   • Juan M. Toro
   • Josep B. Trobalon
   • Núria Sebastián-Gallés

   Short Communication 01 May 2003 Pages: 131 - 136