Gearren is playing whichever "Sarah" is farthest from the camera, alternating between the real Sarah and the T-1000 based on camera position.
An alternate analysis on the spatial relations data, assigning the "correct" response angle to whichever ending location had been indicated in the navigation task, produced essentially equivalent results.
Nate Chinen, however, sees this variety as a vital component of the album's success, attesting that "Aaron Turner expertly alternates between a death-metal roar and a more human wail, using whichever better suits the needs of a song".
During the second week, troponin T and ECGs were taken on alternate days until discharge from ICU, death or for up to two weeks from admission, whichever occurred first.
Patients meeting the inclusion criteria were assessed on alternate days by the study pharmacist until the end of glycopeptide treatment, discharge or death, whichever was sooner, to find out if and when they met predetermined criteria for either IV to oral switch, or discharge.
This alternating pattern continued until the rat had made 60 lever presses, or 60 min had elapsed, whichever came first.
