Age Effects - Development
The data obtained from 263 subjects are presented
as a function of age. Vertical bars indicate the error of the mean.
(Click on any of the pictures to get then in higher resolution)
The mean reaction times from a prosaccade overlap task
(times in milliseconds)
Under overlap conditions (fixation point remains visible)
Saccades to a suddenly presented target stimulus have
reaction times in the order of 200 milliseconds with a
relatively weak age effect.
The mean reaction times from an antisaccade gap task
(correct saccades only, times in milliseconds)
Under gap conditions (fixation point extinguishes 200 milliseconds
before stimulus onset), saccades away from the stimulus
(antisaccades) depend strongly on age.
The mean error rate from an antisaccade gap task
Subjects make a certain number of involuntary saccades to the stimulus
(error) during the antisaccade gap task. The error rate
is very high at age 10 years and below and drops
to a minimum around age 20 years.
We also have these plots for the percent number of express saccades
in the pro overlap task and for the reaction and correction times of the
errors from the anti gap task. Ask by e-mail if interested.