Sentence:  Irregular bedtimes may disrupt healthy brain development in young children, according to a study of intelligence and sleeping habits. Going to bed at a different time each night affected girls more than boys, but both <WSD>fared</WSD> worse on mental tasks than children who had a set bedtime, researchers found. 
Meaning of the word marked with <WSD> tags:  To get along, succeed (well or badly); to be in any state, or pass through any experience, good or bad; to be attended with any circumstances or train of events.