TABLE 4.
Correlation coefficient matrix for the four computer-tracked indices of acquisition performance in the Morris water maze.
| Variable | Latency | Path length | Cumulative distance | First bearing |
|---|---|---|---|---|
| Latency | 1.00 | 0.951 | 0.930 | 0.409 |
| Path length | 1.00 | 0.971 | 0.418 | |
| Cumulative distance | 1.00 | 0.568 | ||
| First bearing | 1.00 |
The results were from an experiment in rats having four treatment groups, one of which was significantly impaired in learning and memory during Morris maze testing (from data published in ref. 33).
The percentage of variance that was accounted for by one variable by the other would be the square of each r-value (R2); hence, the variance accounted for is high between variables such as path length and cumulative distance (R2 = 0.943), but low between the other variables such as first bearing (e.g., between cumulative distance and first bearing, R2 = 0.323).