The impact of convergence insufficiency on selective visual attention among university students
Fig 2
An illustration of the radial frequency RF patterns used in the search stimulus.
A shows the RF stimulus presented as a target (5 RF patterns) while B shows the different RF distractors (3 and 4 RF patterns). C & 1D show the search stimulus where there are 3 distractors while E & 1F show the search stimulus where there are 7 distractors. In E the target stimulus was present while in F the target stimulus was absent.