About the Authors
Department of Psychology, University of Cambridge, Cambridge, United Kingdom
Think Elephants International, Stone Ridge, New York, United States of America
Golden Triangle Asian Elephant Foundation, Chiang Saen, Chiang Rai, Thailand
Center for Mind and Brain, University of California Davis, Davis, California, United States of America
Department of Psychology, Columbia University, New York, New York, United States of America
M.S. 114, East Side Middle School, New York, New York, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JMP JJP TK CW HFB AH JH VJH RK CM BLM VMBM DS BS JU SKV DY NSC JR ELF APD DG. Performed the experiments: JMP TK. Analyzed the data: JMP JJP CW HFB AH JH VJH RK CM BLM VMBM DS BS JU SKV DY ELF APD. Wrote the paper: JMP JJP NSC.