Sample item
Listen and write a summary of 50 to 70 words.
Sleep researchers have shifted from asking how much sleep people need to asking how consistent their timing is. Irregular sleep schedules predict metabolic problems even when total sleep duration is adequate. The mechanism appears to involve circadian misalignment: the body's peripheral clocks fall out of phase with the central one, disrupting glucose regulation.
Sleep research has moved from focusing on sleep duration to sleep timing consistency. Irregular schedules predict metabolic problems even where total sleep is sufficient. The likely mechanism is circadian misalignment, in which peripheral body clocks fall out of phase with the central clock and glucose regulation is disrupted as a result.
54 words: the shift, the finding, the mechanism. One paragraph, no bullet points.