RT Journal Article T1 Not just emotion regulation, but cognition: An experience sampling study testing the relations of ecological interpretation biases and use of emotion regulation strategies with momentary affective states during daily life functioning A1 Boemo Prieto, María Teresa A1 Martín García, Óscar A1 Pacheco Romero, Ana Mar A1 Blanco Martínez, Iván A1 Lafit, Ginette A1 Myin Germeys, Inez A1 Sánchez López, Álvaro AB BackgroundCurrent research is moving from studying cognitive biases and maladaptive emotion regulation (ER) as relatively stable phenomena contributing to affective disturbances, adopting ecological methodologies, such as Experience Sampling Methods (ESM). However, there is still limited ESM evidence on the interactions between stress and ER strategies’ use, and negative interpretation biases, regarding their relations with momentary affective states. In this study, we used a new ESM design to disentangle the contextual, regulatory and cognitive processes implicated in daily affective experiences.MethodA sample of 103 participants completed an ESM study (3 times a day for 10 days) that included self-reports of momentary affect, stress intensity, ER strategies’ use and a cognitive task measuring momentary negative interpretation biases.ResultsMultilevel analyses supported significant interactions of both rumination and worry with stress intensity, to account for momentary higher negative and lower positive affect levels. Furthermore, higher state negative interpretation bias levels uniquely predicted both higher negative and lower positive momentary affect levels.ConclusionThis study implemented a novel online cognitive task within an ESM procedure, which helped to disentangle how contextual ER strategies’ use and momentary cognitive biases uniquely relate to affective experiences in daily life. AB Highlights•We implemented a negative interpretation bias task in an ESM procedure.•Higher NA and lower PA were related to rumination use at higher stress.•Higher NA and lower PA were related to worry use at higher stress.•Stress intensity did not interact with reappraisal in relation with momentary affect.•Momentary interpretation bias was concurrently related with higher NA and lower PA. PB Elsevier YR 2024 FD 2024-06 LK https://hdl.handle.net/20.500.14352/109683 UL https://hdl.handle.net/20.500.14352/109683 LA eng NO Boemo, T., Martín-Garcia, O., Pacheco-Romero, A. M., Blanco, I., Lafit, G., Myin-Germeys, I., & Sanchez-Lopez, A. (2024). Not just emotion regulation, but cognition: An experience sampling study testing the relations of ecological interpretation biases and use of emotion regulation strategies with momentary affective states during daily life functioning. Behaviour Research and Therapy, 177, 104550. NO Ministerio de Ciencia, Innovación y Universidades (España) DS Docta Complutense RD 5 abr 2025