Table 1
Comparison between the mean Cronbach’s alpha values for each quality of the original data and the 50th and 95th percentile (in parenthesis) Cronbach’s alpha values based on 1000 collections of randomly permuted data for each of the 56 time series. All Cronbach’s alpha values were deemed statistically significant since they exceeded the 95th percentile of the 1000 unrelated collections.
| Cronbach’s alpha | ||||
|---|---|---|---|---|
| Brightness | Roughness | Mass | Tension | |
| Original data | .65 | .85 | .69 | .89 |
| Random permutation | −.03 (.08) | −.03 (.08) | −.03 (.08) | −.03 (.07) |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.