The magnitude of ST-segment elevation at presentation and the rates of complete occlusion of the culprit artery were similar in both groups.
Another limitation of the present study is that the rate of stimuli presentation was not matched for the two presentation modes so it is not possible to arrive at definite conclusions about the superiority of one condition over the other.
For example, studies based on rapid serial visual presentation (RSVP) of words or parts of sentences suffer from the problem that the rate of presentation (i.e., which information is presented and when it is attended to) is externally determined instead of internally controlled (i.e., by the subject).
Indeed, the melody of a song may facilitate learning and recall of the words [32], [33], though this advantage appears to be diminished when the rate of presentation is controlled for, such that spoken lyrics are presented at the same rate as sung ones [34].
We predicted and confirmed that some regions that showed activation changes following each oddball are affected by the rate of presentation of the oddballs, or the probability of an oddball target.
Manipulating the number of operands allowed us to investigate the specific effect of calculation, while manipulating the rate of presentation allowed us to increase task difficulty independent of calculation.
These include the rate of presentation, the number of trials, and the structure of the underlying sequence.
As the rate of presentation in the standard AB condition was different from that in the other conditions, performance in the standard AB condition was analyzed separately.
As the rate of presentation was different in the standard stimuli condition than in the rotated targets and rotated distractors condition, separate analyses were carried out.
Because the P300 response is elicited by an external stimulus, operation speed is dictated by the rate of presentation of these stimuli.
