of an IR source directed to the ocular limbus and a software .... the english language arts, Journal of Behavioral Optom
Simultaneous objective and subjective evaluation of ocular movement using DEM and Readalyzer Maria Vittoria Manzoli, Alessio Facchin, Angela Ravasi, Roberto Pregliasco, Silvia Tavazzi, Silvio Maffioletti Corso di Laurea in Ottica e Optometria, Università degli Studi di Milano Bicocca, Via Cozzi 53, I-20125 Milano.
European Academy 2010 Copenhagen 15 - 16 May
SUBJECTS
Since the variables are evaluated during developmental age, and normal Pearson correlation may return not real and higher value, we decide to perform all correlation using partial correlation, corrected for age. The primary comparison are performed VT AHT Ratio Errors between DEM subtest and data obtained Number of fixation 0,30 0,39 0,33 0,16 p=0,000 p=0,002 p=0,127 from ReadAlyzer using C card of DEM as Number of regression p=0,004 0,36 0,48 0,42 0,27 p=0,001 p=0,000 p=0,000 p=0,011 stimuli. 0,41 0,36 0,2682 Fixation duration 0,0126 p=0,000 p=0,001 p=0,01 p=0,90 The results show several relationship; -0,43 -0,45 -0,24 -0,23 Rate (numbers/min) p=0,000 p=0,000 p=0,02 p=0,03 the higher are between AHT and number 0,23 0,31 0,27 Regression ratio 0,18 of regression and between ratio and p=,035 p=,003 p=,010 p=,083 Cross Correlation -0,18 -0,13 0,03 0,02 number of regression. p=0,101 p=0,240 p=0,770 p=0,878 If we use the synthetic values:
Mean saccade in Return Sweep
0,14 p=0,18
0,12 p=0,26
0,02 p=0,80
0,04 p=0,69
55 50
120
45
DEM Vertical time (sec.)
Tracking test fixation + regression
111 children from 6 to 14 years from a local state primary school participated to the study (49♂ and 62♀). All subjects present a near visual acuity with or without refractive correction ≥ 0,8. Due to a problem with the ReadAlyzer software some data have been lost and not all the correlations analyze all subjects data. For this reason each graph reports the number of subjects analyzed.
140
40 35 30 25 20 15
80 60
n=81 r=0,22 p
