Male Long Evans rats reared with a Fischer-344 peer during the juvenile period show deficits in social competency: a role for play
Abstract
Rats that are deprived of play during the juvenile period develop into adults that have a host of socio-cognitive impairments. Thus, it has been hypothesized that experiencing play fighting during the juvenile period refines executive functions. The present study assesses the social ability of adult, male Long-Evans hooded (LE) rats that have been reared with either a same age and sex LE rat or a Fischer-344 (F344), a low playing strain. As adults, their social skills were assessed. This was done by introducing each rat into a neutral arena with an unfamiliar partner. As predicted, rats from both conditions engaged the stranger in play, but the LE rats that had been reared with a F344 partner were more likely to escalate these playful interactions into aggressive ones. These findings support the hypothesis that play experience during the juvenile period is critical for the development of some executive functions.
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Increased aggression is also observed when rodents are raised with genetically modified conspecifics showing reduced social interaction, suggesting behavioural changes occur under less extreme social deprivation.
“Furthermore, increased aggression is also observed when rodents are raised with genetically modified conspecifics that show reduced social interaction,51 suggesting that behavioural changes also occur under less extreme forms of social deprivation.”
From The effects of social deprivation on adolescent development and mental health (2020) · cites this paper as [51]
It can be readily discerned when a playful encounter escalates to serious fighting, as the aggressor switches from attacking the nape to biting the partner's posterior.
“Consequently, it can be readily discerned when a playful encounter escalates to serious fighting, as the aggressor switches from attacking the nape to biting the partner's posterior (Stark and Pellis, 2020).”
From The rough-and-tumble play of rats as a natural behavior suitable for studying the social brain (2022) · cites this paper as Stark and Pellis, 2020
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Self-citation
- Authors
- Stark, R., & Pellis, S. M.
- Affiliations
- University of Lethbridge (CA)
- Corresponding author
- Stark, Rachel
- Venue
- International Journal of Play
- Publisher
- Informa UK Limited
- Published
- 2020-01-02
- Volume
- 9
- Issue
- 1
- Pages
- 76-91
- ISSN
- 2159-4937 (ISSN-L)
- 2159-4953
- OpenAlex
- W3006495386
- Semantic Scholar
- b0b19b0e192801d829605c52281cb6b3f78e9239
- Cited by
- 32
- References
- 87
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 8 · 2023: 9 · 2022: 6 · 2021: 2 · 2020: 2
- FWCI
- 5.01
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- International Journal of Play (publishedVersion)
- Topics
- Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
- Social Sciences › Psychology › Developmental and Educational Psychology › Child and Animal Learning Development
- Social Sciences › Psychology › Social Psychology › Primate Behavior and Ecology
- Keywords
- play fighting, social play, social competence, executive function, Long-Evans rats, F344 rats, social development (developmental psychology)
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