Emotion regulation plays a crucial role in responding to daily stressors. While intrapersonal
emotion regulation has received significant attention, the role of interpersonal emotion
regulation remains understudied. This study aimed to explore the associations between
intrapersonal perseverative cognition (i.e., rumination and worry) and interpersonal
perseverative cognition (i.e., co-rumination), in the context of daily negative events.
A daily diary study was conducted with a sample of university students (N = 178).
The study comprised a baseline survey assessing trait-level variables, followed by
a diary study where participants were sent an approximately two-minute-long survey
every evening for 10 consecutive days. The findings indicated that daily co-rumination
was associated with daily intrapersonal perseverative cognition, even when controlling
for trait-level worry. The association between intra- and interpersonal perseverative
cognition was stronger in the presence of daily negative events. Our findings indicate
a need for further investigation into the contemporaneous relationship between co-rumination
and intrapersonal rumination/worry, to ascertain their unique or joint adverse effects
on mental health, especially within the context of daily negative events.
