| Variables | Sample | Mean | Standard Deviation | Kurtosis | Skewness | In-between Range |
| Reliability* | 20 | 0.79 | 0.13 | 2.31 | -1.31 | 0.36-0.94 |
| Age | 20 | 5.59 | 0.68 | -0.68 | -0.29 | 4.5-6.5 |
| Measure Design | 20 | 1.36 | 1.36 | 0.22 | .99 | 0-4 |
| Number of Items | 20 | 26.32 | 16.1 | 0.20 | 0.78 | 4-64 |
| Publication Year | 20 | 1996 | 8.9 | -1.09 | 0.32 | 1975-1998 |