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

the 10-second Test in children between the ages of. 7 and 'r0; and
Experiment IV assessed the apprication of the 1O-second Test in preschool
children. The 10-Second Test differs from Thornton's (977)
Rapid Dark Àdaptation Test in that the test light illuminance on the
surface was 0.087 uW, whereas the illuminance in Thornton's RDÀT was
0.02 uW. Moreover, for the 10-second Test, the subject had to identify
only a white plastic disc from a pile of 4 red, 4 blue and 'l white
discs. For Thornton's RDÀT, however, the subject had to sort 5 white,6
blue, and 7 red discs. The 10-Second Test and Thornton's RDÀT were
similar in lhat the intensity of light for light adaptation and light
adapLation period were the same.
77
Three different dark adaptation test procedures llere used in the
process of collecting data:
1
2"
3.
Rapid Dark Adaptation (Thornton , 1977)
MuItiple Decision Test (Sevenhuysen, 1984)
À 1 0-Second Test
In experiment I, the Rapid Dark Àdaptation Test and the 1O-second Test
and in experiment II the Multiple Ðecision Test were used with five
adult subjects. Five replicates of each of these tests were performed
by each of the five subjects on five different days. Three consecutive
trials were conducted for each replicate of each of the three dark adaptalion
tests. The three dark adaptation tests (napid Dark Adaptation
Test, I'fultiple Decision Test and 1O-second Test) were performed by each
subject one after the other each day until five replicates vrere conpleted.
In experiment Iii both lhe Rapid Dark Adaptation Test and