The range the study gave for time in bed was actually 6.9–8.5 hours (not 8-9). But it’s a good point that subjective sleep duration reports significantly overestimate actigraph measurements.
The range the study gave for time in bed was actually 6.9–8.5 hours (not 8-9). But it’s a good point that subjective sleep duration reports significantly overestimate actigraph measurements.