1. Watching the best nutcrackers: what capuchin monkeys (Cebus apella) know about others’ tool-using skills

   • Eduardo B. Ottoni
   • Briseida Dogo de Resende
   • Patrícia Izar

   Original Article 18 February 2005 Pages: 215 - 219

   

2. Piagetian conservation of discrete quantities in bonobos (Pan paniscus), chimpanzees (Pan troglodytes), and orangutans (Pongo pygmaeus)

   • Chikako Suda
   • Josep Call

   Original Article 04 February 2005 Pages: 220 - 235

   

3. Means-means-end tool choice in cotton-top tamarins (Saguinus oedipus): finding the limits on primates’ knowledge of tools

   • Laurie R. Santos
   • Alexandra Rosati
   • Marc D. Hauser

   Original Article 25 January 2005 Pages: 236 - 246

   

4. Analog number representations in mongoose lemurs (Eulemur mongoz): evidence from a search task

   • Kerrie P. Lewis
   • Sarah Jaffe
   • Elizabeth M. Brannon

   Original Article 20 January 2005 Pages: 247 - 252

   

5. Expectations about numerical events in four lemur species (Eulemur fulvus, Eulemur mongoz, Lemur catta and Varecia rubra)

   • Laurie R. Santos
   • Jennifer L. Barnes
   • Neha Mahajan

   Original Article 24 February 2005 Pages: 253 - 262

   

6. Chimpanzee (Pan troglodytes) intentional communication is not contingent upon food

   • Jamie L. Russell
   • Stephanie Braccini
   • William D. Hopkins

   Original Article 02 March 2005 Pages: 263 - 272

   

7. Post-choice information processing by pigeons

   • Tracy I. Martin
   • Thomas R. Zentall

   Original Article 03 March 2005 Pages: 273 - 278