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Childhood and Adolescent Bullying Perpetration and Later Substance Use: A Meta-analysis

CONTEXT: Previous meta-analyses substantially contributed to our understanding of increased drug use risk in bullies but only included research up to 2014 and did not report on other types of substances. OBJECTIVE: To review and meta-analyze existing …

Reward Responsiveness, Optimism, and Social and Mental Functioning in Children Aged 6-7: Protocol of a Cross-Sectional Pilot Study

There is evidence that reward responsiveness and optimism are associated with mental and social functioning in adolescence and adulthood, but it is unknown if this is also the case for young children. Part of the reason for this gap in the literature …

Blije gezichten en andere beloningen: aandacht voor positieve informatie als beschermend mechanisme tegen depressie

This is a Dutch summary of my PhD thesis Happy faces and other rewards. Positieve informatie roept vaak sterke reacties op, maar niet bij iedereen. Wie minder sterk reageert op positieve informatie heeft een zogenaamde lage positieve bias. In dit …

De genetica van opvoeding

Reward-Related Attentional Bias at Age 16 Predicts Onset of Depression During 9 Years of Follow-up

This study investigated whether low reward responsiveness marks vulnerability for developing depression in a large cohort of never-depressed 16-year-old adolescents who completed a reward task and were subsequently followed for 9 years, during which …

Reciprocal associations between positive emotions and motivation in daily life: Network analyses in anhedonic individuals and healthy controls

Anhedonia reflects a dysfunction in the reward system, which can be manifested in an inability to enjoy pleasurable situations (i.e., lack of positive emotions), but also by a lack of motivation to engage in pleasurable activities (i.e., lack of …

Alpha-amylase reactivity and recovery patterns in anhedonic young adults performing a tandem skydive

Background Anhedonia (loss of pleasure) is characterized by low responsiveness to rewards and, by virtue of being one of the two core symptoms of depression, by altered responses to stress. We investigated the effect of an acute stress experience …

Spread the Joy: How High and Low Bias for Happy Facial Emotions Translate into Different Daily Life Affect Dynamics

There is evidence that people commonly show a bias toward happy facial emotions during laboratory tasks, that is, they identify other people’s happy facial emotions faster than other people’s negative facial emotions. However, not everybody shows …

Measuring BDNF in saliva using commercial ELISA: Results from a small pilot study

Brain-derived neurotrophic factor (BDNF) is a protein often studied in psychiatric populations. Commercial ELISA kits have been validated for measuring BDNF in blood plasma and serum, but blood collection is an invasive method which cannot always be …

An Exploratory Randomized Controlled Trial of Personalized Lifestyle Advice and Tandem Skydives as a Means to Reduce Anhedonia

Anhedonia is a major public health concern and has proven particularly difficult to counteract. It has been hypothesized that anhedonia can be deterred by engagement in rewarding social and physical events. The aims of the present study were to …