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Table 3 Factor arrays for the five factors

From: College students’ attachment to their smartphones: a subjective operant approach

Statement

F1

F2

F3

F4

F5

S29. My smartphone holds lots of my personal secrets. I would feel very uncomfortable if somebody looked inside my phone

+ 5

+ 1

0

+ 5

+ 1

S20. I am used to smartphone browsing prior to going to bed. If I don’t do this, I have a hard time getting to sleep

+ 5**

− 1

 + 1

− 1

0

S40. I feel safe when I have my smartphone with me. It will help me at times of emergency

+ 4

+ 2

+ 2

+ 3

+ 3

S14. I habitually check my smartphone once every few minutes. If I don’t check the phone for an extended period of time, I feel like I am missing something important

+ 4**

0

0

0

− 2

S10. My smartphone is my wallet, my notebook, and my backpack—I need it to make payment, take notes, and record important information

+ 4

+ 4

+ 4

+ 5

+ 5

S45. When I get onto my smartphone, I often don’t realize how quickly time goes by

+ 3

+ 2

+ 3

+ 1

+ 1

S2. My smartphone is my main tool of entertainment. I use it to watch videos, read books, and enjoy music

+ 3

+ 5

+ 5

+ 2

+ 5

9. Whenever I have free time, I get onto my smartphone to kill the time

+ 3

+ 2

+ 4*

+ 1

+ 3

47. After having studied hard or having worked hard at something, it is a great joy to get onto my smartphone for casual browsing

+ 3

+ 4

+ 3

+ 2

+ 2

17. I feel embarrassed when people sit together and everyone is busy checking their smartphones, without anyone talking to each other

+ 2

+ 3

+ 1*

− 1*

+ 3

24. If I leave my phone behind, I will feel uneasy, and must go back to get my phone before I can continue with the rest of the day

+ 2

0

− 3

− 2

+ 3

33. When I buy a new smartphone, I mainly consider best value for the money and practical features. I won’t buy a pricey phone if there is a cheaper replacement available

+ 2

+ 4

+ 2

+ 4

+ 1

12. I often regret the excessive amount of time I spend on my smartphone, which is interfering with my routine study and daily life

+ 2**

+ 5**

0

0

0

48. I am used to casual browsing on my smartphone, just dawdling away my time for no particular purpose

+ 2

+ 1

+ 5**

− 2**

+ 1*

11. I have this hate-and-love feeling about my smartphone, because I cannot resist its temptation, and sometimes do things that I regret

+ 2*

+ 3*

− 2

0

0

50. My smartphone is my reliable helper when I have questions in my life and study

+ 1

+ 2

+ 4

+ 1

+ 4

23. I put my smartphone within easy reach. If it falls out of my sight, I will feel uneasy

+ 1

− 2**

-5**

+ 1

+ 2

1. My smartphone is like my housekeeper and aide. It helps me coordinate and track everyday things

+ 1

+ 1

+ 3

+ 3

+ 4

25. I keep my power bank with me all time. Otherwise my phone would run out of battery before day’s end

+ 1

− 3*

− 1

0

− 1

26. If I lost my smartphone, it would be disastrous. I would try everything possible to get it back before I could do anything else

+ 1

− 2

− 2

0

+ 2

16. When having a face-to-face conversation, I am offended if the other party checks the phone while listening to me talk

+ 1

+ 3

+ 1

0

+ 4

46. My smartphone gives me a platform to present myself. I use it to record important occasions in my daily life, and publicize information among my network of friends

0*

+ 1

+ 2

+ 4

+ 2

32. It is important for me to personalize my apps and the smartphone screen, because I consider my smartphone part of myself

0

+ 1

− 3**

+ 2

+ 1

43. I often get to the end of my bandwidth allowance, and sometimes I use up all the bandwidth at the end of the month

0

− 2*

+ 2*

0

− 4*

22. I am used to checking my smartphone while waking up in the middle of the night

0**

− 3

− 3

− 3

− 3

8. My smartphone is like my personal agent. It takes care of my daily routines; without it, I would not know what to do

0

− 4*

+ 1

− 1

+ 2**

27. If the teacher asks me to turn in my smartphone in class, I cannot help but think of my phone from time to time in class

0

− 1

− 1

− 1

− 1

44. I look upon my smartphone as my pal, who understands me well and keeps me company all the time

0

− 1*

+ 2**

− 5**

0

28. The smartphone is merely a tool for me. Even if I don’t have it, I believe I can still complete my daily study and living tasks

0

+ 2

+ 3*

+ 1

0

30. I am versed in knowing the features and using most of the apps on my smartphone

− 1

0**

− 1

+ 3**

− 2

15. With the smartphone on my side, I often have difficulty concentrating on the lectures or doing what the teacher asks me to do in class

− 1*

0**

− 4

− 2

− 2

6. My smartphone is like my right-hand pal. I cannot accomplish anything without its help

− 1

− 5

− 3

− 4

0

49. After having spent so much time with my smartphone, I sometimes feel I am further distanced from my friends and the outside world

− 1*

+ 1**

− 4

− 4

− 2

42. I often make an effort in reducing the amount of time I spend on my smartphone so as to reduce my dependency on it and minimize its interference with my daily life

− 1

+ 2

− 1

+ 2

− 1

41. Every time I buy a new phone, I feel emotional to part ways with my old phone

− 1

0

+ 2

0

0

7. I consider my smartphone a part of my extended family that promotes mutual understanding among family members

− 2

− 3**

+ 1

− 1

+ 2*

21. I feel that the use of smartphone has reduced the daily communication between me and my friends

− 2

+ 3**

− 2

− 4

− 2

4. My smartphone is like a naughty sister/brother: it is lovely when it behaves, but it can be disappointing and annoying at times when it does not behave

− 2

− 1

+ 1

− 2

0

5. My smartphone is like my pet—it knows how to please me, and it knows how to not upset me

− 2

− 4

0*

− 2

− 1

18. Everything I do now depends on the smartphone. I feel hard to communicate with people without the smartphone

− 2

− 2

− 4

− 3

− 1

31. My smartphone is like my twin sister/brother. I share everything with him/her, and she/he knows everything about me

− 2

− 3

− 1

− 2

− 2

3. I regard my smartphone as my slave/servant. It listens to me and does what I ask it to do

− 3

− 5

0**

− 3

− 3

19. My smartphone is just a tool for me in communicating with others. Except voice calls and WeChat messages, I rarely use other apps and features

− 3

− 2

− 2

− 5

− 5

35. I often search for new apps and study their new features, and try them out to see how it works

− 3

0

0

+ 2**

-3

38. I know more about smartphone technologies and apps than most of my fellow students

− 3

0

0

+ 2**

− 3

34. I pay attention to the latest developments with apps, and want to be among the first in installing updates

− 4

− 1*

0*

+ 4**

− 4

37. I pay attention to the newest smartphone releases, and want to know the latest technical features and applications

− 4

− 1

− 2

+ 2**

− 4

13. I maintain a good level of self-control, and typically complete the tasks I have planned for the day by not spending an excessive amount of time on smartphone use

− 4**

0

− 1

− 1

− 1

36. I value the brand of the smartphone I use, and want to get the best phone I can afford

− 5

− 2

− 5

− 3

+ 1**

39. Whenever a new generation of the smartphone is released, I try to upgrade to the latest phone if possible

− 5*

− 4

− 2*

+ 1**

− 5

  1. Underlined items are consensus items among all five factors
  2. *Distinguishing items, significant at p < 0.05
  3. **Distinguishing items, significant at p < 0.01