Cognitive Disengagement Syndrome (CDS) is a clinical construct characterized by symptoms such as excessive daydreaming, mental confusion, slowed behavior, and reduced cognitive and motor activity. Increasing evidence suggests a potential overlap between CDS and Emotional Dysregulation (ED), a transdiagnostic construct associated with difficulties in regulating emotional responses. This narrative review synthesizes current empirical findings and theoretical perspectives on the co-occurrence of CDS and ED, with a particular focus on insights provided by behavioral genetics—especially twin studies. We describe the core principles and models used in twin research and evaluate how they have been applied to disentangle genetic and environmental contributions to these phenotypes and their overlap. While some studies support a shared etiology between CDS and ED, particularly through non-shared environmental influences, research in this area remains limited and conceptually fragmented. The review identifies critical knowledge gaps, including the lack of longitudinal studies, inconsistent definitions of ED, and limited exploration of developmental trajectories. We argue that future twin studies are essential for clarifying these unresolved issues. Nonetheless, limitations include the scarcity of twin-based studies directly examining the CDS–ED association and methodological inconsistencies across the existing literature.

Background/Objectives: Cognitive Disengagement Syndrome (CDS) is a clinical condition primarily characterized by inattention, hypoactivity, and mind-wandering, which has not yet been recognized as an official diagnostic category. Although there are overlaps between CDS and ADHD, evidence supports the semi-independence of CDS from the ADHD-Inattentive subtype. Importantly, while the impact of ADHD on parenting styles has been studied, no previous research has investigated the potential influence of CDS difficulties on parenting behaviors. Both CDS and ADHD are associated with internalizing and externalizing symptoms, which are influenced by negative parenting styles. The severity of ADHD is known to predict the use of dysfunctional parenting patterns; however, no studies have yet investigated how CDS difficulties might affect parenting styles. Due to the similarities between CDS and ADHD, it is reasonable to hypothesize a similar relationship. This study aims to examine the potential mediating role of parenting styles—both negative and positive—in the relationship between CDS difficulties and internalizing and externalizing symptoms. Methods: The sample is composed of 369 Italian school-aged children (9.38 ± 2.34 years old). Parents reported on their children’s psychopathology, CDS difficulties, and their own parenting strategies. Results: Analyses conducted using Hayes’ PROCESS tool indicated that only negative parenting styles partially mediated the relationship between CDS difficulties and parent-reported youth anxiety, depression, and oppositional defiant disorder. Conclusions: These findings highlight the importance of interventions aimed at both addressing CDS in children and improving parenting strategies to enhance youth psychopathological outcomes.