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Table 2 Psychological measures used in the assessment protocol (primary and secondary)

From: Research protocol for a randomized controlled trial of the health effects of volunteering for seniors

Outcomes

Instruments

Primary

 

 Psychological Well-Being

Warwick-Edinburgh Mental Well-Being Scale [77]

 Depression

Center for Epidemiologic Studies Depression Scale [78]

 Self-esteem

Rosenberg Self-Esteem Survey [79]

 Quality of Life

Global Quality of Life Scale [80]

Secondary

 

 Personal Growth

Personal Growth subscale of Ryff’s Psychological Well-Being Scales [81]

 Purpose in Life

Purpose In Life subscale of Ryff’s Psychological Well-Being Scales [81]

 Social Support

Social Provisions Scale [82]

 Self-Efficacy

Generalized Self-Efficacy Scale [83]