Wynn, Karen <br/><br/>
Constraints on natural altruism.  [electronic resource] 

 -  British journal of psychology (London, England : 1953)  Aug 2009 
 - 481-5; discussion 487-90 p.  digital 
<br/><br/> Publication Type: Comment; Journal Article 
<br/><br/><label>ISSN: </label>0007-1269 
<br/><br/><label>Standard No.: </label>10.1348/000712609X441312  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adaptation, Psychological--physiology<br/>Age Factors<br/>Aging--psychology<br/>Altruism<br/>Biological Evolution<br/>Child Behavior--physiology<br/>Child, Preschool<br/>Cooperative Behavior<br/>Empathy<br/>Helping Behavior<br/>Humans<br/>Infant<br/>Interpersonal Relations<br/>Models, Psychological<br/>Motivation<br/>Selection, Genetic<br/>Social Behavior<br/>Surveys and Questionnaires