Sentence:  In view of the important role which emotional disturbances play in the genesis of neurotic and psychotic disorders and the parallelism <WSD>observed</WSD> between autonomic states and psychological behavior in several instances , it is further suggested that a hypothalamic imbalance may play an important role in initiating mental changes . 
Meaning of the word marked with <WSD> tags:  discover or determine the existence, presence, or fact of