EndophenotypesEvent-Related Potentials, P300PhenotypeSchizophreniaIchthyosis, X-LinkedSchizophrenic PsychologyGenetic Predisposition to DiseaseSiblingsGenetic ResearchEvoked Potentials, AuditoryTwin Studies as TopicCognition DisordersBipolar DisorderFamilyStartle ReactionNeuropsychological TestsGenetic Association StudiesSensory GatingBrainGenotypeDiseases in TwinsAutistic DisorderImpulsive BehaviorPersonality DisordersAttention Deficit Disorder with HyperactivityInheritance PatternsExploratory BehaviorDepressive Disorder, MajorQuantitative Trait, HeritablePolymorphism, Single NucleotideGenome-Wide Association StudyElectroencephalographyCognitionMental DisordersFamily Health