Table 5 Description of measures.

From: Social support and mental health in late adolescence are correlated for genetic, as well as environmental, reasons

Construct

Measure Name

Number of items

Sample item

Item scoring

Higher score represents

Internal consistency, α

Social Support

Support quantity

Lubben Social Network Scale – Revised (friendships section)82

6

“How many friends do you see or hear from at least once a month?”

6 point scale from “none” to “nine or more”, or from “less than monthly” to “daily”, or from “never” to “always”

Greater quantity of support

0.82

Support quality

Multidimensional Scale of Perceived Social Support83

12

Family subscale (4 items): “My family really tries to help” Friend subscale (4 items): “I can count on my friends when things go wrong” Significant other subscale (4 items): “There is a special person who is around when I am in need”

7 point scale from “very strongly disagree” to “very strongly agree”

Greater quality of support

0.93

Wellbeing

Positive affect

Positive and Negative Affect Scale (PANAS) positive affect subscale84

10

“Indicate to what extent you have felt this way during the past few weeks: Interested”

5 point scale from “very slightly or not at all” to “extremely”

Greater positive emotion

0.88

Negative affect

Positive and Negative Affect Scale (PANAS) negative affect subscale84

10

“Indicate to what extent you have felt this way during the past few weeks: Distressed”

5 point scale from “very slightly or not at all” to “extremely”

Less negative emotion

0.86

Subjective happiness

Subjective Happiness Scale85

4

“Some people are generally very happy and enjoy life regardless of what is going on. To what extent does this describe you?”

7 point scale from “not at all” to “a great deal”

Greater happiness

0.81

Life satisfaction

Brief Multidimensional Students’ Life Satisfaction Scale86

6

“How happy are you with your friendships?”

7 point scale from “very dissatisfied” to “very satisfied”

Greater life satisfaction

0.84

Gratitude

Gratitude Questionnaire87

6

“I have so much in life to be thankful for.”

7 point scale from “strongly disagree” to “strongly agree”

Higher level of gratitude

0.83

Meaning in life

Meaningful life scale88

5

“My life interests and excites me.”

7 point scale from “strongly disagree” to “strongly agree”

Higher level of meaning in life

0.86

Autonomy

Basic Psychological Needs Scale autonomy subscale89,90

7

“I feel like I am free to decide for myself how to live my life”

7 point scale ranging from “not at all true” to “very true”

Higher level of autonomy

0.71

Competence

Basic Psychological Needs Scale competence subscale89,90

6

“Often I do not feel very competent”

7 point scale ranging from “not at all true” to “very true”

Higher level of competence

0.77

Relatedness

Basic Psychological Needs Scale relatedness subscale89,90

8

“I really like the people I interact with”

7 point scale ranging from “not at all true” to “very true”

Higher level of relatedness

0.84

Depression

Depression

Centre for Epidemiologic Studies Depression Scale91

20

“I was bothered by things that usually don’t bother me”

4 point scale from “rarely or none of the time” to “most or all of the time”

Lower level of depressive symptomology

0.88