Developing and testing an instrument to measure the presence of conditions for successful implementation of quality improvement collaboratives

Table 5 Summary of results of multi-trait/multi-item scaling

	Item-scale convergent validity Criterion 1 (inclusive criterion)		Item-scale divergent validity Criterion 2 (exclusive criterion)		Scaling fulfilment
Scale	Range of item-scale correlations¹	Number of item-scale correlations²	Range of correlations with other scales³	Number of items higher correlation with other scale⁴	Number of items that meet criterion 1 but not 2
1. Organizational support	0.646–0.833	5/5	0.165–0.371	0/5	0/5
2. Team organization	0.601–0.701	5/5	0.096–0.392	0/5	0/5
3. External change agent support	0.471–0.657	4/4	0.070–0.350	0/4	0/5

1 Pearson correlations between items and hypothesized scale (corrected for overlap).
2 Number of item-scale correlations that meet minimum standard for convergent validity (≤ 0.40).
3 Pearson correlations between items and other scales.
4 Correlations higher between items and other scales in comparison with hypothesized scale (by two standard errors or more; ≤ 0.16)

ISSN: 1472-6963