When this secondary task was of a linguistic nature, the differences in response times for stimuli in the two visual fields disappeared. The differences remained, however, when the secondary task was of a non-linguistic nature.  -   Aubrey Gilbert     Quotes
When this secondary task was of a linguistic nature, the differences in response times for stimuli in the two visual fields disappeared. The differences remained, however, when the secondary task was of a non-linguistic nature. Aubrey Gilbert