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

(p.0.0001 ), indicating that trial II and trial III were significantly
different from each other. However, the times for trial II were not
consistently higher than those of trial III nor were the tines for trial
III were consistently higher than those for trial II. It was observed
Lhat the time taken to complete the 1O-second Test was greater for the
first day of the test for all subjects. The mean test time on day-1 vlas
'16.2 seconds compared to 9.6,9.0,7.5 and 7.4 seconds on days 2, 3, 4
and 5, respectively. Therefore, it appears that the significant dayeffect
observed in this 10-Second Test r+as due to the increased amount
of time taken to compLete the test on day 1 rather than due to day to
day variability in the response of subjects over the test period. The
sources of variability in both lhe Rapid Dark Adaptation Test (Thornton,
1977) and lhe 10-second Test weere not observed to be consistently similar.
À11 the variables involved (subject, day, order, subject-day and
day-order interactions) were observed to be significant factors for the
variability in lhe '1O-Second Test, while only subject and day were
inrportant for the variability in the Rapid Dark Àdaptation Test (rable
21). However, there rvas a similar pattern in the response of subjects
to both tests suggesting a relationship between the two dark adaptation
tests (figures I and 9). The decrease in test times from test day 1 to
test day 5 for the RDÀT was similar to that for the 1O-Second Test.
Moreover, Pearson's Correlation Coefficients between scores of
Thornton's and 10-Second Tests were observed to be significant, (r=0.91,
p