Episodic memory is based on how accurate the participant responds using the measures from immediate word recall (range 0-15), delayed word recall (range 0-15), word recognition (range 0-15), and picture recognition (range 0-20) tasks. The sum of four the accuracy scores, are summed, and averaged to provide a composite score (range 0-37.5). This composite score reflects the ability to store, hold, and retrieve information of an episodic nature (such as an event, a name, an object, a scene, or an appointment). A high score reflects someone able to recall memory for a prolonged period. A negative change from baseline reflects impairment compared to baseline.
LS mean was calculated using mixed model ANCOVA adjusting for predose, sequence, period, day, time, treatment, and treatment*time as fixed effects and participant within sequence and treatment as random effect.