Psychomotor performance tests ( fine motor , finger tapping , nystagmus , critical flicker-fusion frequency , temporal estimation , 'd 2 ' cancellation , and simple reaction time ) and subjective self-reports ( drunkenness , drowsiness , mental slowness , clumsiness , anger , attentiveness , competence , happiness , hostility , interest , and extroversion ) were carried out at baseline and multiple points thereafter .