A Preliminary Evaluation of the Physiological Mechanisms of Action for Sleep Restriction Therapy
Table 6
Correlation coefficients between subjective sleepiness, alertness, and sleep variables for each participant during treatment.
Participants/alertness and sleepiness
Sleep variables
SOL
WASO
TWT
TST
SE
Participant 1
Alertness
−0.30*
0.13
−0.07
0.19
0.12
Sleepiness
0.51***
0.01
0.35**
−0.37**
−0.42
Sleepy at night
−0.39**
−0.29*
−0.39**
−0.02
0.32
Participant 2
Alertness
−0.41**
−0.28*
−0.32*
0.53***
0.35**
Sleepiness
−0.01
0.26
0.28*
−0.17
−0.28*
Sleepy at night
−0.29*
−0.07
−0.07
−0.07
0.01
Participant 3
Alertness
−0.02
−0.28
−0.22
0.25
0.21
Sleepiness
−0.02
0.32*
−0.02
−0.16
0.01
Sleepy at night
−0.16
0.31*
0.05
−0.08
−0.04
Participant 4
Alertness
0.01
−0.27
0.08
0.29
0.03
Sleepiness
0.13
0.55***
0.17
−0.52***
−0.28
Sleepy at night
−0.30
−0.16
−0.05
0.18
0.09
Participant 5
Alertness
−0.13
−0.44**
−0.28
0.29
0.31*
Sleepiness
−0.07
0.39**
0.17
−0.17
−0.19
Sleepy at night
−0.25
−0.27
−0.38**
0.24
0.36*
SOL: sleep-onset latency; WASO: wake after sleep-onset; TWT: total wake time including SOL, WASO, and early morning awakening; TST: total sleep time.
*
; **; ***.