Modulation of Reinforcement Learning

Inclusion Criteria: * Age between 18 and 26 years * male * IQ\>80 * written informed consent * proband understands character, extent and individual consequences of the study * competent persons who are able to follow the instructions of the study personnel * for ASD patients: assured ASD diagnosis, comply of the ASD criteria ADI-R/ADOS-G Exclusion Criteria: * prosopagnosia * anaphylaxis of oxytocin or other chemical substances * metal inside the body or other contraindications of mri scan * physical illness which can affect the examinations or endanger the proband * actual or assumed drug or alcohol abuse * persons who are accommodated in an institution because of court or administrative order * persons with a relationship of dependence to the sponsor or investigator * healthy probands: psychiatric disorder according to ICD-10-WHO F at the moment and in history, continuous drug-intake at time of measurements * patients with ASD: psychiatric disorder according to ICD-10-WHO F (except ASD disorder in patient group) during the last 12 month being not treated, continuous drug-intake at time of measurements (psychotropic medication), exception: stimulants used for treatment of attention disorders, if they can come off for the measurements