References

• 1978CAN SOCIAL INTERACTION BE USED TO MEASURE ANXIETY?804 cited
• 1992Ethology and neurobiology of grooming behavior739 cited
• 1981The ontogeny of play in rats537 cited
• 1980Endogenous opioids and social behavior531 cited
• 1980Social deprivation and play in rats409 cited
• 1977A critical period for social isolation in the rat342 cited
• 1972The Development of Social Interaction, Play, and Metacommunication in Mammals: An Ethological Perspective273 cited
• 1978Brief periods of socialization and later behavior in the rat232 cited
• 1989Involvement of opioid and dopaminergic systems in isolation-induced pinning and social grooming of young rats222 cited
• 1981Play as a reinforcer for maze-learning in juvenile rats198 cited
• 1982Short-term isolation increases social interactions of male rats: A parametric analysis175 cited
• 1985Opiates and play dominance in juvenile rats.167 cited
• 1989Aggressive behaviors in adult rats deprived of playfighting experience as juveniles133 cited
• 1995Influence of environmental factors on social play behavior of juvenile rats127 cited
• 1990Effects of morphine and naloxone on play‐rewarded spatial discrimination in juvenile rats