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. 2017 May 23;8:730. doi: 10.3389/fpsyg.2017.00730

Table 8.

Cronbach alpha coefficient for the Experience of Caregiving Inventory (ECI) (Szmukler et al., 1996), the Adult Sibling Relationship Questionnaire (ASRQ) (Stocker et al., 1997).

Experience of caregiving items Study sample Szmukler et al., 1996
α α
Difficult behaviors 0.91 0.91
Negative symptoms 0.91 0.89
Stigma 0.87 0.82
Problems with services 0.88 0.90
Effects on family 0.82 0.82
Need to back up 0.72 0.76
Dependency 0.80 0.74
Loss 0.85 0.79
Positive personal experiences 0.88 0.86
Good aspects of the relationship 0.83 0.82

Sibling relationship items Study sample Stocker et al., 1997
α α

Warmth 0.98 0.97
Acceptance 0.93 0.88
Admiration 0.94 0.83
Affection 0.94 0.92
Emotional support 0.94 0.90
Intimacy 0.95 0.92
Instrumental support 0.82 0.76
Knowledge 0.90 0.88
Similarity 0.90 0.83
Conflict 0.92 0.93
Antagonism 0.88 0.90
Competition 0.72 0.85
Dominance 0.79 0.74
Quarreling 0.87 0.86
Rivalry 0.91 0.88
Maternal rivalry 0.92 0.85
Paternal rivalry 0.95 0.89

WHOQol- Bref domains Study sample World Health Organisation [WHO], 1998
α α

Physical domain 0.70 0.68–0.74
Psychological domain 0.79 0.79–0.80
Social domain 0.79 0.68–0.70
Environment domain 0.79 0.84–0.87