Getting stuck on threatening stimuli is often associated with difficulties in regulating negative emotional experiences. (sciencedaily.com)
This might partly be because a central component of children's AD is the predominance and high intensity of negative emotional experiences as well as hyperarousal, which might lead to either over-control of emotions (i.e., suppression) or under - control of emotions (i.e., more negative affect) in emotionally arousing interactions (Suveg and Zeman 2004). (link.springer.com)
The paper, which was published in Proceedings of the Royal Society B, took into account the sleep experiences of 16 pooches of different breeds that were exposed to either positive or negative emotional experiences pre-sleep, like being given affectionate hugs, or being approached by an intimidating stranger. (petsmagazine.com.sg)