Table 3 Development of candidate items
From: Development and psychometric testing of the Aesthetics of Everyday Life Scale in Aging (AELSA)
Stage 1. Questionnaire construction | ||
 Qualitative study (n = 16) Literature review | Item generation | 61 items developed |
 Evaluation by older adults (n = 10) | Face validity | 1) Qualitative face validity: Two items were merged due to semantic overlap, 6 items amended |
2) quantitative face validity: Impact score of 8 items < 1.5 and were deleted | ||
 Evaluation by expert (n = 12) | Content validity | 1) Qualitative Content validity: 5 items amended 2) Content Validity Ratio (essential): 6 items had CVR < 0.56 and were deleteda 3) Content Validity Index (relevancy): I-CVI valueb of 3 items < 0.70. and were deleted S-CVI/Ave = 0.94c |
Stage 2. Evaluating psychometric properties of the scale | ||
 Main study (n = 380) | Structural validity | 7-Fctor model -Family and others (8 -items) -Art and artistic activities (5–items) -Communication and social presence (5 items) -Spirituality and transcendence of the soul (5 –items) -Beauty of appearance and physical health(4–items) -Independence in life (4 -items) -Perception of the environment's beauty (3–items) |
EPEA-S = 34 items (final version) | ||
Scale’ Reliability and stability | ||
 The sub-sample (n = 15) | Internal consistency | Cronbach’s alpha = 0.926 |
 The sub-sample (n = 15) | Test–retest reliability | ICC = 0.90, 95% CI = 0.85–0.95d SEM agreement = 1.38e SDC95 = 3.81f |