a 
Natural History Museum, University of Pisa, Via Roma, 79, CALCI, Pisa, Italy
b CNR, Institute of Cognitive Sciences and Technologies, Via Aldrovandi 16b, Rome, Italy
c Department of Psychology, University of Tennessee, 1404 Circle Drive, Knoxville, TN, United States
b CNR, Institute of Cognitive Sciences and Technologies, Via Aldrovandi 16b, Rome, Italy
c Department of Psychology, University of Tennessee, 1404 Circle Drive, Knoxville, TN, United States
Abstract
Rough-and-tumble play
 (RT) is a widespread phenomenon in mammals. Since it involves 
competition, whereby one animal attempts to gain advantage over another,
 RT runs the risk of escalation to serious fighting. Competition is 
typically curtailed by some degree of cooperation and different signals 
help negotiate potential mishaps during RT. This review provides a 
framework for such signals, showing that they range along two 
dimensions: one from signals borrowed from other functional contexts to 
those that are unique to play, and the other from purely emotional 
expressions to highly cognitive (intentional) constructions. Some animal
 taxa have exaggerated the emotional and cognitive interplay aspects of 
play signals, yielding admixtures of communication that have led to 
complex forms of RT. This complexity has been further exaggerated in 
some lineages by the development of specific novel gestures that can be 
used to negotiate playful mood and entice reluctant partners. 
Play-derived gestures may provide new mechanisms by which more 
sophisticated communication forms can evolve. Therefore, RT and playful 
communication provide a window into the study of social cognition, 
emotional regulation and the evolution of communication systems. 
Biological Reviews © 2016 Cambridge Philosophical Society.
Author keywords
Emotional signals; Facial expressions; Gestures; Intentional signals; Self-handicapping behaviour
ISSN: 14647931Source Type: Journal
Original language: English
DOI: 10.1111/brv.12172Document Type: Article
Publisher: Blackwell Publishing Ltd