Alle Publikationen
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2014
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(2014): Adolescent-specific patterns of behavior and neural activity during social reinforcement learning. In: Cognitive, affective & behavioral neuroscience 14 (2), S. 683-697. DOI: 10.3758/s13415-014-0257-z
DOI: http://www.ncbi.nlm.nih.gov/pubmed/24550063 Abstract: Humans are sophisticated social beings. Social cues from others are exceptionally salient, particularly during adolescence. Understanding how adolescents interpret and learn from variable social signals can provide insight into the observed shift in social sensitivity during this period. The present study tested 120 participants between the ages of 8 and 25 years on a social reinforcement learning task where the probability of receiving positive social feedback was parametrically manipulated. Seventy-eight of these participants completed the task during fMRI scanning. Modeling trial-by-trial learning, children and adults showed higher positive learning rates than did adolescents, suggesting that adolescents demonstrated less differentiation in their reaction times for peers who provided more positive feedback. Forming expectations about receiving positive social reinforcement correlated with neural activity within the medial prefrontal cortex and ventral striatum across age. Adolescents, unlike children and adults, showed greater insular activity during positive prediction error learning and increased activity in the supplementary motor cortex and the putamen when receiving positive social feedback regardless of the expected outcome, suggesting that peer approval may motivate adolescents toward action. While different amounts of positive social reinforcement enhanced learning in children and adults, all positive social reinforcement equally motivated adolescents. Together, these findings indicate that sensitivity to peer approval during adolescence goes beyond simple reinforcement theory accounts and suggest possible explanations for how peers may motivate adolescent behavior. zitiert von 59
Keywords: Adolescent, Adolescent Behavior, Adult, Age Factors, Brain Mapping, Brain/blood supply/physiology, Child, Cues, Female, Gruppenverhalten, Humans, Image Processing, Computer-Assisted, Lerntheorien, Male, Motivation, Neuropsychological Tests, Oxygen/blood, Photic Stimulation, Reinforcement, Reinforcement, Social, Sex Factors, Verhaltensforschung, Young Adult 2009
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(2009): Development during adolescence of the neural processing of social emotion. In: Journal of cognitive neuroscience 21 (9), S. 1736-1750. DOI: 10.1162/jocn.2009.21121
DOI: https://doi.org/10.1162/jocn.2009.21121 Abstract: In this fMRI study, we investigated the development between adolescence and adulthood of the neural processing of social emotions. Unlike basic emotions (such as disgust and fear), social emotions (such as guilt and embarrassment) require the representation of another's mental states. Nineteen adolescents (10-18 years) and 10 adults (22-32 years) were scanned while thinking about scenarios featuring either social or basic emotions. In both age groups, the anterior rostral medial prefrontal cortex (MPFC) was activated during social versus basic emotion. However, adolescents activated a lateral part of the MPFC for social versus basic emotions, whereas adults did not. Relative to adolescents, adults showed higher activity in the left temporal pole for social versus basic emotions. These results show that, although the MPFC is activated during social emotion in both adults and adolescents, adolescents recruit anterior (MPFC) regions more than do adults, and adults recruit posterior (temporal) regions more than do adolescents.
Keywords: Adolescent, Adolescent Development, Adult, Age Factors, Brain Mapping, Brain/anatomy & histology/blood supply/physiology, Emotions/physiology, Female, Humans, Image Processing, Computer-Assisted/methods, Magnetic Resonance Imaging/methods, Mother-Child Relations, Neuropsychological Tests, Oxygen/blood, Self Concept, Social Perception, Young Adult
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