Oddly Wired
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attention

You cannot process two rapid events as separate occurrences.

The attentional blink occurs when a second target is missed if it appears within 200 to 500 milliseconds of the first AND is followed by other items (distractors).

It is not a literal window where the system is 'locked' for all incoming information, but a specific competition for processing resources in rapid serial visual presentation.

Your focus comes at the cost of missing the world around you.

Where this comes from

Study
Raymond, Shapiro, and Arnell, 1992
What the check found
The definition of the attentional blink requires the presence of subsequent distractors. Without them, the 'blink' effect is often not observed.
Confidence
Solid, with limits

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.