Table 2.
Overall rating of each measurement property per scale and grading of the quality of evidence per measurement property per scale across all studies.
| Aging perceptions questionnaire | Aging semantic differential | Anxiety about ageing questionnaire | Attitudes to aging questionnaire | Expectations Regarding Aging | Facts on aging quiz | Fraboni scale of ageism | Image of aging scale | Kogan’s attitudes towards older people scale | Reactions to aging questionnaire | Tuckman & Lorge Questionnaire | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Content validity | Overall rating | +/- | + | +/- | +/- | + | +/- | +/- | + | +/- | +/- | +/- |
| Quality of evidence | Moderate | Moderate | Low | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Very low | |
| Structural validity | Overall rating | + | – | + | + | + | + | + | +/- | + | ? | ? |
| Quality of evidence | Low | Low | Moderate | Low | Moderate | Moderate | Moderate | Low | Low | Moderate | Very low | |
| Internal consistency | Overall rating | – | + | – | + | + | ? | – | +/- | + | – | ? |
| Quality of evidence | Low | Low | Low | Low | Low | Low | Low | Low | Low | Moderate | Low | |
| Cross cultural validity/measurement invariance | Overall rating | – | + | – | – | ? | ? | + | – | – | ||
| Quality of evidence | Low | Moderate | Low | Moderate | Very low | Moderate | Low | Moderate | Very low | |||
| Reliability | Overall rating | + | + | +/- | + | – | + | + | + | – | ||
| Quality of evidence | Moderate | Moderate | Moderate | Moderate | Moderate | Very low | Moderate | Moderate | Moderate | |||
| Measurement error | Overall rating | ? | ||||||||||
| Quality of evidence | Very low | |||||||||||
| Criterion validity | Overall rating | + | ? | ? | ||||||||
| Quality of evidence | High | Moderate | Very low | |||||||||
| Construct validity | Overall rating | + (convergent & known groups) | +(convergent) +/- (known groups) | +(convergent) - (known groups) | + (convergent & known groups) | + (convergent & known groups) | -(convergent), + (known groups) | + (convergent & known groups) | + (convergent & known groups) | +/-(convergent), + (known groups) | +/-(convergent),? (known groups) | ?(convergent)+ (known groups) |
| Quality of evidence | High (convergent), Moderate (known groups) | Low (convergent & known groups) | Moderate (convergent & known groups) | Low (convergent), Moderate (known groups) | Moderate (convergent), Low (known groups) | Low (convergent & known groups) | Moderate (convergent & known groups) | High (convergent), Low (known groups) | Low (convergent & known groups) | Low (convergent), Moderate (known groups) | Very low (convergent), Moderate (known groups) | |
| Responsiveness | Overall rating | ? | + | ? | ||||||||
| Quality of evidence | Very low | Very low | Very low |
Overall rating of psychometric property: + (sufficient), - (insufficient), +/- (inconsistent),? (indeterminate). Overall quality of the evidence: High (very confident that the true measurement lies close to the estimate), Moderate (moderately confident in the measurement property estimate), Low (limited confidence in the measurement property), Very low (very little confidence in the measurement property estimate).