![]() Flicker location varied randomly and was therefore congruent with target location on 20% of trials. We then presented the same flickering stimuli as pre-cues in a visual search task containing five elements. Performance was at or near ceiling until 48 Hz and dropped sharply to chance level at 60 Hz and above. ![]() ![]() We first established flicker detection rates for each frequency. Using a 480 Hz visual display rate, we presented smoothly sampled sinusoidal temporal modulations at: 20, 30, 40, 48, 60, 69, 80 and 96 Hz. ![]() We tested whether fast flicker can capture attention using eight flicker frequencies from 20–96 Hz, including several too high to be perceived (>50 Hz).
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