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. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: Behav Sleep Med. 2016 Jun 27;16(2):135–153. doi: 10.1080/15402002.2016.1178115

Table 2.

Endorsement rates and factor structure.

Item Percentage Endorsed Dysregulative Factor
E = 1.30
α = .63
Restorative Factor
E = 2.43
α = .70
Emotional Factor
E = 2.84
α = .76
Appetitive Factor
E = 1.77
α = .68
Mindful Factor
E = 10.79
α = .78
Because I have taken medication that makes me drowsy 13.02% .73 .33 .44 .17 .30
I slept a lot the night before; I slept too much the night before 10.93% .69 .39 .44 .42 .33
I work a nightshift for my job 6.74% .65 .17 .18 .25 .33
I have been sick; I am not feeling well 47.21 % .55 .62 .46 .01 .30
I nap to prepare for strenuous physical activity (i.e., exercise) 17.67% .54 .21 .25 .39 .43
I nap after strenuous physical activity (i.e., exercise) 33.95% .52 .38 .45 .45 .38
I am experiencing pain 17.44% .52 .53 .51 .19 .35
I didn’t get enough sleep the night before 70.23% .22 .95 .40 .25 .38
I didn’t sleep well the night before 60.23% .32 .75 .35 .26 .29
I am tired 81.16% .23 .71 .36 .23 .42
I know I have to stay up late (e.g., for school or work) that night 43.95% .38 .64 .53 .34 .54
I fell asleep even though I didn’t intend to (i.e., accidentally dozed off) 40% .39 .51 .66 .12 .20
Because I am avoiding a social situation 10.23% .42 .29 .88 .41 .29
Because I am avoiding work; procrastinating 31.16% .21 .46 .82 .33 .23
I am sad or depressed 34.42% .31 .62 .71 .46 .37
Because I am bored 25.81% .35 .26 .70 .45 .16
I am stressed or overwhelmed 42.79% .25 .69 .68 .43 .34
To improve my mood 36.05% .27 .58 .58 .55 .56
Because napping is a habit for me 18.37% .30 .25 .46 .82 .21
Because napping is part of my schedule; I plan to nap 12.56% .27 .26 .38 .80 .31
I enjoy napping; it feels good 59.30% .27 .27 .39 .77 .39
I feel I do better with a nap; I feel that naps are beneficial 55.35% .18 .33 .27 .75 .67
Because I have free time 35.81% .30 .40 .63 .54 .27
To increase my attention 44.65% .33 .36 .27 .32 .93
To increase alertness 42.79% .35 .28 .22 .28 .91
To give me more energy 60.47% .35 .41 .24 .34 .85
To help me refocus; Because I have been thinking a lot and need to refocus 47.67% .30 .51 .34 .31 .71
To decrease grogginess 37.67% .33 .41 .26 .19 .56
I have heard that people do better with a nap; I have heard that napping is beneficial 30.70% .26 .27 .23 .32 .49