Motivation and subsequent memory
To explore motivational effects on subsequent memory for the word
pairs, a subsequent memory analysis was performed using a second
GLM analysis. In this analysis we modeled the activation during the entire
trial, from cue onset to feedback offset, during learning phase 1,
with two predictors of interest: trials that were subsequently answered
correctly and trials that were answered incorrectly during learning
phase 2. To identify brain regions in which the relation between brain
activity and subsequent memory were affected by motivation, an
ANCOVA was performed using the motivation change rating as a
covariate for the change in the strength of the subsequent memory
effect from BEFORE to AFTER the manipulation, as defined by the
contrast: AFTER (subsequent correct N subsequent incorrect) N BEFORE
(subsequent correct N subsequent incorrect).