How do you actually measure something as private as emotion regulation?
Most of what we know comes from self-report questionnaires. These ask a person to rate how they typically respond when upset—for example, whether they replay the problem over and over or blame themselves—and the answers are treated as a measure of their emotion regulation ability [1][2]. This is the dominant approach in the studies reviewed on insomnia, and it is also how the link between anxiety and insomnia severity has been examined, with emotion regulation treated as a factor that can strengthen or weaken that link [1].
A second, smaller strand moves beyond questionnaires. One study used EEG recordings alongside behavioural tasks to compare how people with subclinical insomnia process emotional material against controls, looking for neural and behavioural differences rather than self-description [4]. A clinical case report describes a therapy built around emotion regulation ability and strategies in a 54-year-old woman with chronic insomnia, which implies the ability was assessed in a clinical setting, though the report does not spell out deficits [3]. The review of 17 studies notes that this mix of methods is a real weakness: inconsistent measurement makes it hard to compare findings across studies [2].
The deficits that keep showing up: rumination, self-blame and a body that won't settle
The most consistent finding is a reliance on what researchers call maladaptive cognitive strategies. People living with insomnia show heightened hyperarousal, increased cognitive arousal before sleep, and heavier use of self-blame, catastrophising and rumination [2]. In plain terms, the mind treats bedtime as a problem to be solved and keeps working on it, which is the opposite of what falling asleep requires.
Related work in middle-aged and older adults ties maladaptive emotion regulation strategies to insomnia, with these strategies acting as a pathway between lower resilience and worse sleep [5]. That study did not specifically enrol people with chronic insomnia, so it broadens the pattern rather than confirming it for the chronic group. The review's synthesis is that the deficit is consistent across the insomnia literature, while cautioning that study designs have been inadequate and measurement inconsistent [2].
Why the deficit matters for treatment—and where the story gets murky
If poor emotion regulation helps keep insomnia going, then improving it should help sleep. The review reports that standard insomnia interventions can ease symptoms and improve emotion regulation, and that approaches aimed directly at emotion regulation strategies may offer individualised advantages [2]. It also points to a bidirectional relationship between sleep and mood, with negative emotional reactivity emerging as a central mediator—suggesting the loop can run in either direction [2]. Neurobiological work described in the review points to dysregulation in the prefrontal–limbic network, a set of brain regions involved in managing emotional reactions, and suggests that strengthening cingulo–limbic connectivity might benefit both sleep and mood [2]. That is a hypothesis about mechanism, not a demonstrated treatment.
The murkiness is worth naming. Treatment outcomes appear to be influenced by psychiatric comorbidity and coping styles [2], and the evidence base includes a single case study of an emotion-regulation-focused therapy in chronic insomnia that does not report clear deficits [3]. The subclinical EEG study is informative about neural processing differences but its participants did not have chronic insomnia, so its findings cannot be carried over directly [4]. The review's own conclusion is that more rigorous, standardised methods are needed before the mechanisms are clear [2].
Sources used in this answer
Emotion regulation as a moderator between anxiety symptoms and insomnia symptom severity
Emotion regulation was assessed with questionnaires in a sample including people with insomnia, and deficits in emotion regulation were linked to more severe insomnia, moderating the anxiety–insomnia relationship.
Insomnia and Emotion Regulation: A Narrative Review of Empirical Findings and Underlying Mechanisms
Across 17 studies, people with insomnia show a consistent emotion regulation deficit, including heightened hyperarousal, pre-sleep cognitive arousal, and reliance on self-blame, catastrophising and rumination, though measurement inconsistency limits the evidence.
Training for emotion regulation in patients with insomnia disorder: A novel therapeutic in the early stage of development
A clinical case study describes an emotion-regulation-focused therapy as an adjunct to CBT-I in a 54-year-old woman with chronic insomnia, without explicitly reporting emotion regulation deficits.
Emotion regulation strategies in subclinical insomnia: electrophysiological insights into neural processing differences
In people with subclinical insomnia, EEG and behavioural tasks revealed altered emotion regulation processing compared with controls, but the group did not have chronic insomnia.
Relationship between resilience and insomnia among the middle-aged and elderly: mediating role of maladaptive emotion regulation strategies
In middle-aged and elderly adults, maladaptive emotion regulation strategies mediated the relationship between resilience and insomnia, though chronic insomnia was not specifically defined.