in partial fulfil]ment of the - MSpace - University of Manitoba

variation in the performance of subjects over the five days was due to
lhe learning-effect involved rather than the lack of reproducability of
the test. The test was replicated regardless of what day the test was
performedr âs shown by the absence of significant day-order interaction
(p.0.2510). Sources of variability in the test are summarized in Table
21, There was no significant difference between trial-II and trial-iII
in the Rapid Dark Adaptation Test (p.0.0590) indicating that the Rapid
Dark Àdaptation Test (Thornton, 1977 ) was reproducible over trials.
However, there was a statistically significant day-effect on the performance
of subjects (p.0.0001). The time Laken to complete the test
was dependent on what day the test was performed when the average time
of all subjects over the five days was taken (ra¡te Zl).
85
A significant
inter-subject variability was also observed (p