one of the main problems of the drug abusers is drug related attention bias, which causes craving, and as a result drive the drug abusers to take narcotics. methadone is used as a maintenance treatment for drug abusers. the purpose of this study is evaluation of the effect of methadone maintenance therapy (mmt) on selective attention and drug related attention bias. this study investigated drug...

objective: early recognition of negative emotions is considered to be of vital importance. it seems that children with attention deficit hyperactivity disorder have some difficulties recognizing facial emotional expressions, especially negative ones. this study investigated the preference of children with attention deficit hyperactivity disorder for negative (angry, sad) facial expressions comp...