| Tag | Value |
|---|---|
| file | Reliability_eur-reliability-101-en_eur-reliability-101-en |
| name | eur-reliability-101-en |
| section | Reliability/Analysis/Parallel forms |
| type | num |
| solution | 0.92 |
| tolerance | 0 |
| Type | Calculation |
| Program | Calculator |
| Language | English |
| Level | Statistical Literacy |
Below you find the observed scores on two parallel forms of a depression scale consisting of 8 items scored on a 5‐point Likert scale.
| Participant | Form1 | Form2 |
|---|---|---|
| 1 | 17 | 19 |
| 2 | 21 | 23 |
| 3 | 14 | 11 |
| 4 | 28 | 24 |
| 5 | 32 | 34 |
| 6 | 24 | 21 |
Calculate the reliability of depression scale using the alternate forms estimate of reliability.
The reliability of the depression scale can be estimated by calculating the correlation between the two alternative forms. The correlation is: =