Table 2.
Reliability and validity statistics of the Family Stigma Instrument
| FAMSI domains | Distribution of data | Floor and ceiling | Reliability | Convergent validity | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean (s.d.) | Skewness | Kurtosis | Minimum | Maximum | Lowest score (%) | Highest score (%) | Internal consistency (α) | Test–retest | Pearson's r | |||
| ICC | Lower | Upper | ||||||||||
| Stigma by association | 27.37 (6.96) | −1.255 | 1.630 | 8 | 38 | 5.7 | 0 | 0.917 | 0.822 | 0.699 | 0.894 | 0.098a |
| Positive aspects of caregiving | 19.26 (4.39) | −0.046 | 0.160 | 8 | 30 | 0 | 2.9 | 0.720 | 0.832 | 0.715 | 0.900 | 0.039 |
| Affiliate stigma (total) | 25.76 (7.51) | 0.188 | −0.223 | 12 | 44 | 5.7 | 0 | 0.858 | 0.728 | 0.544 | 0.840 | −0.120 |
| Affective | 6.93 (2.93) | 0.694 | −0.640 | 4 | 14 | 32.9 | 0 | 0.857 | 0.749 | 0.577 | 0.851 | −0.183 |
| Perceived | 12.09 (4.23) | −0.429 | −0.625 | 4 | 20 | 7.1 | 2.9 | 0.875 | 0.818 | 0.696 | 0.893 | 0.023 |
| Behavioural | 6.74 (2.56) | 0.794 | 0.073 | 4 | 14 | 30.0 | 0 | 0.759 | 0.746 | 0.570 | 0.850 | −0.181 |
FAMSI, Family Stigma Instrument; ICC, intraclass correlation coefficient.
a.
Use of non-parametric test.