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Engert, V.; Kok, B. E.; Puhlmann, L. M.; Stalder, T.; Kirschbaum, C.; Papanastasopoulou, C.; Papassotiriou, I.; Pervanidou, P.; Chrousos, G. P.; Singer, T.: Exploring the multidimensional complex systems structure of the stress response and its relation to health and sleep outcomes. Brain, Behavior, and Immunity 73, pp. 390 - 402 (2018)

Fredrickson, B. L.; Kok, B. E.: Evidence for the upward spiral stands steady: A response to Nickerson. Psychological Science 29 (3), pp. 467 - 470 (2018)

Isgett, S. F.; Kok, B. E.; Baczkowski, B.; Algoe, S. B.; Grewen, K. M.; Fredrickson, B. L.: Influences of oxytocin and respiratory sinus arrhythmia on emotions and social behavior in daily life. Emotion 17 (8), pp. 1156 - 1165 (2017)

Engert, V.; Kok, B. E.; Papassotiriou, I.; Chrousos, G. P.; Singer, T.: Specific reduction in cortisol stress reactivity after social but not attention-based mental training. Science Advances 3 (10), e1700495 (2017)

Lumma, A.-L.; Kok, B. E.; Singer, T.: Corrigendum to “Is meditation always relaxing? Investigating heart rate, heart rate variability, experienced effort and likeability during training of three types of meditation”. International Journal of Psychophysiology 117, pp. 126 - 130 (2017)

Kok, B. E.; Singer, T.: Phenomenological fingerprints of four meditations: Differential state changes in affect, mind-wandering, meta-cognition and interoception before and after daily practice across nine months of training. Mindfulness 8 (1), pp. 218 - 231 (2017)

Kok, B. E.; Singer, T.: Effects of contemplative dyads on engagement and perceived social connectedness over 9 months of mental training: A randomized clinical trial. JAMA Psychiatry 74 (2), pp. 126 - 134 (2017)

Kok, B. E.; Singer, T.: Erratum to: Phenomenological fingerprints of four meditations: Differential state changes in affect, mind-wandering, meta-cognition, and interoception before and after daily practice across 9 months of training. Mindfulness 8 (1), pp. 257 - 258 (2017)

Bornemann, B.; Kok, B. E.; Böckler, A.; Singer, T.: Helping from the heart: Voluntary upregulation of heart rate variability predicts altruistic behavior. Biological Psychology 119, pp. 54 - 63 (2016)

Pek, J.; Chalmers, R. P.; Kok, B. E.; Losardo, D.: Visualizing confidence bands for semiparametrically estimated nonlinear relations among latent variables. Journal of Educational and Behavioral Statistics 40 (4), pp. 402 - 423 (2015)

Kok, B. E.; Fredrickson, B. L.: Evidence for the upward spiral stands steady: A response to Heathers, Brown, Coyne, & Friedman. Psychological Science 26 (7), pp. 1144 - 1146 (2015)

Lumma, A.-L.; Kok, B. E.; Singer, T.: Is meditation always relaxing?: Investigating heart rate, heart rate variability, experienced effort and likeability during training of three types of meditation. International Journal of Psychophysiology 97 (1), pp. 38 - 45 (2015)

Kok, B. E.; Coffey, K. A.; Cohn, M. A.; Catalino, L. I.; Vacharkulksemsuk, T.; Algoe, S.; Brantley, M.; Fredrickson, B. L.: How positive emotions build physical health: Perceived positive social connections account for the upward spiral between positive emotions and vagal tone. Psychological Science 24 (7), pp. 1123 - 1132 (2013)

Kok, B. E.; Waugh, C. E.; Fredrickson, B. L.: Meditation and health: The search for mechanisms of action. Social and Personality Psychology Compass 7 (1), pp. 27 - 39 (2013)

Kok, B. E.; Fredrickson, B. L.: Upward spirals of the heart: Autonomic flexibility, as indexed by vagal tone, reciprocally and prospectively predicts positive emotions and social connectedness. Biological Psychology 85 (3), pp. 432 - 436 (2010)

Pek, J.; Sterba, S. K.; Kok, B. E.; Bauer, D. J.: Estimating and visualizing nonlinear relations among latent variables: A semiparametric approach. Multivariate Behavioral Research 44 (4), pp. 404 - 437 (2009)

Singer, T.; Kok, B. E.; Bornemann, B.; Zurborg, S.; Bolz, M.; Bochow, C.: The ReSource Project: Background, design, samples, and measurements. Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig (2016)

Singer, T.; Kok, B. E.; Bornemann, B.; Bolz, M.; Bochow, C.: The ReSource Project: Background, design, samples, and measurements. Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig (2015)

Kok, B. E.; Fredrickson, B. L.: Well-being begins with "we": The physical and mental health benefits of interventions that increase social closeness. In: Wellbeing: A Complete Reference Guide: Vol. 6 Interventions and policies to enhance well-being, pp. 277 - 306 (Eds. Huppert, F. A.; Cooper, C. L.). Wiley-Blackwell, Chichester (2014)

Kok, B. E.: The science of subjective experience: Positive emotions and social closeness influence autonomic functioning. In: Compassion: Bridging practice and science, pp. 314 - 324 (Eds. Singer, T.; Bolz, M.) (2013)