Sleep: He et al., 2020

Question 1

Aim (He et al.)

Answer 1

To determine how limiting the use of mobile phones before bedtime affects mood, working memory, pre-sleep arousal and sleep quality.

Question 2

Method

Answer 2

• 38 uni students who had habit of using phone before bed as well as experiencing poor sleep quality
• Positive and Negative Affect schedule, N-Back Task, Pre-Sleep Arousal Scale, Pittsburgh Sleep Quality Index and Online Sleep Diary

Question 3

IV

Answer 3

Use of mobile phones during bedtime vs no mobile phone use for 30 minutes before bedtime

Question 4

DV

Answer 4

Mood, working memory, pre-sleep arousal, sleep quality

Question 5

Key Findings

Answer 5

Participants who did not use mobile phone 30 minutes before bedtime:

• took less time to fall asleep
• had improved quality of sleep
• reduced pre-sleep arousal
• improved PANAS
• improved working memory

Question 6

Criticism

Answer 6

• Small sample size, limits generalisability to population
• Measures gathered subjective data (excluding N-back)