Reflect on the past month and rate how often each statement applied. For choices, consider occasions when you could choose. Sleep means your main sleep period, even if it is during the day. These 20 original items are for self-reflection, not a validated scale or diagnosis. Evening preference is not a sleep problem in itself; consider it separately from sleep difficulties.
Reflect on the past month and rate how often each statement applied. For choices, consider occasions when you could choose. Sleep means your main sleep period, even if it is during the day. These 20 original items are for self-reflection, not a validated scale or diagnosis. Evening preference is not a sleep problem in itself; consider it separately from sleep difficulties.
These unvalidated sums describe your answers, not illness or severity. Higher values mean more endorsement of the statements. Evening preference is separate from sleep difficulties; it is not a disorder. No population comparisons are provided.
20 items, each scored 0-4. Four difficulty dimensions contain 16 items (0-64); evening preference contains 4 separate items (0-16). There are no clinical cutoffs.