Beran, Michael J <br/><br/>
Maintenance of delay of gratification by four chimpanzees (Pan troglodytes): the effects of delayed reward visibility, experimenter presence, and extended delay intervals.  [electronic resource] 

 -  Behavioural processes  Nov 2006 
 - 315-24 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, N.I.H., Extramural 
<br/><br/><label>ISSN: </label>0376-6357 
<br/><br/><label>Standard No.: </label>10.1016/j.beproc.2006.07.005  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Choice Behavior<br/>Comprehension<br/>Discrimination Learning<br/>Female<br/>Food Preferences<br/>Impulsive Behavior<br/>Male<br/>Motivation<br/>Pan troglodytes--psychology<br/>Reward<br/>Satiety Response<br/>Social Behavior<br/>Time Factors<br/>Visual Perception