Figure 3
From: Bringing the real world into the fMRI scanner: Repetition effects for pictures versus real objects
Repetition effects for 2D pictures and 3D objects within LO and pFS.
The magnitude of repetition effects for each stimulus type within each region was quantified using an Adaptation Index (AI)4,93. The AI represents differences in responses between Repeat and Different conditions relative to the overall fMRI response, thereby providing a measure of repetition effects scaled according to activation levels for each stimulus in each ROI. Positive index values reflect higher responses on Different than Repeat trials; negative values indicate the reverse pattern and values around zero indicate a lack of repetition effects. To provide meaningful data interpretation in a within-subjects design, error bars for the difference scores are based on the 95% confidence intervals, which indicate whether or not the average difference was significantly greater than zero (with probabilities equal to those from the t-test).
