Sentence:  The chronic effects of the barbiturates on neurological and psychic function resemble those of alcohol. There may be dizziness, clumsiness and ataxia; dysarthria, nystagmus, mental disturbances, nervousness, tremor, <WSD>lallation</WSD>, confusion, peculiar behavior, weakness of judgment, emotional instability and hallucinations. 
Meaning of the word marked with <WSD> tags:  Baby-talk or gibberish.