Interpersonal Emotion Regulation (IER) refers to a group of emotion regulation strategies through which people regulate their emotions by utilizing the presence of others. Studies focusing on IER have recently increased, probably due to the availability of a psychometrically sound IER measure, the Interpersonal Emotion Regulation Questionnaire (IERQ; Hofmann et al.Cognitive Therapy and Research, 40(3), 341-356, 2016). The present study sought to examine the psychometric properties of the Turkish version of IERQ with a sample of Turkish adolescents. Results confirmed the four-factor structure of IERQ with a group of 269 adolescents between ages 14 to 17. Turkish adolescent version of IERQ showed adequate levels of reliability and construct validity through the subscales' significant correlations with dimensions of intrapersonal emotion regulation and social problem-solving. Adolescence is a period where close relationships with peers are initiated, and relying on peers at times of distress becomes prominent. The adolescent version of IERQ provides the opportunity to investigate IER patterns in adolescents, which is crucial for their psychological adjustment.

Interpersonal emotion regulation (IER) is a term that covers all the interpersonal associations people engage in to modify the emotional state of either self or others. Although the importance of utilizing others in the ER process is not new, comprehensive IER models have not been introduced until recently. The models focus on different aspects of IER with some focusing on the attempts at increasing positive or negative emotions experienced by others, while others focus on the IER strategies, leading to the development of differing ideas on the functions and consequences of IER processes, especially regarding their implications in mental health. Many therapeutic approaches involve the therapist's regulation of the client's emotions using different methods, which indicates that IER processes are also involved in the treatment of mental health problems. The chapter aims to clarify the role of IER in mental health, with a focus on the specific topics that require further research, in addition to the examination of the therapeutic work from an IER perspective.