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Table 1 Demographic characteristics and correlations

From: Problematic mobile phone use and time management disposition in Chinese college students: the chain mediating role of sleep quality and cognitive flexibility

 

Mean

SD

1

2

3

4

5

6

1. Age

19.78

1.74

1

     

2. Gender

0.71

0.45

-0.03

1

    

3. PMPU

27.24

8.41

-0.11**

-0.05

1

   

4. Sleep quality index

2.94

2.58

0.02

0.00

0.37***

1

  

5. Cognitive flexibility

73.27

12.82

-0.02

0.02

-0.20***

-0.17***

1

 

6. TMD

154.53

27.53

0.01

-0.05

-0.18***

-0.26***

0.62***

1

  1. Note. Gender (0 = female, 1 = male); SD = standardized deviation; PMPU = problematic mobile phone use; TMD = time management disposition; a high sleep quality index indicated the poor sleep quality; **p < 0.01; ***p < 0.001
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BMC Psychology

ISSN: 2050-7283

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