What is the fine-grained topic of the following text: Detection did not occur for fixations below 100 ms, and reached asymptote for fixations above 200 ms. Detectable filtering lengthened fixation durations by 160 ms, and interference from an imminent manual response occurred by 400-450 ms, often lengthening the next fixation. Only return the topic.
Eye fixation durations and detection times in visual processing