The P300 had previously been shown to be elicited by unexpected stimuli.

To test for inattentional blindness, researchers ask participants to complete a primary task while an unexpected stimulus is presented.

Inattentional blindness occurs when there is an interaction between an individual's attentional set and the salience of the unexpected stimulus.

Inattentional blindness is most likely to occur if the unexpected stimuli presented resembles the environment.

Automatic processing can lessen one's mental workload, which can lead to a person to missing the unexpected stimuli.

While subjects were completing the assigned task, an unexpected visual stimulus was presented.

Results revealed that unexpected stimuli were more likely to be missed during manipulation of information than in the more simple rehearsal task.

She gasped, a reflexive gesture that Phoebe didn't understand but was her human form's way of responding to unexpected stimuli.

A momentary lapse brought on by unexpected physical stimuli.

The P300 has been closely tied to context updating, which can be initiated by unexpected stimuli.