A 58-year-old man on ICU day 5 is being assessed for delirium using the Confusion Assessment Method for the ICU (CAM-ICU). He is alert, able to squeeze hands on command, but when asked to squeeze only on hearing the letter 'A' in a sequence, he squeezes on every letter. He has no fluctuating course documented by nursing staff. What CAM-ICU feature does this error pattern most likely represent?