This Web presentation demonstrates that the performance trends of individuals track the mean performance. Upper curve demonstrates results of variable viewing distance protocol with relatively constant performance with increasing image format densities. Lower curve demonstrates declining performance in the fixed viewing distance protocol. The error bars are the standard deviation of mean for all the trials. Upper curve demonstrates results of variable viewing distance protocol with relatively constant performance with increasing image format densities.
Lower curve demonstrates declining performance in the fixed viewing distance protocol.
The error bars are the standard deviation of mean for all the trials.