Profiles of the mean fraction of stars in different age bins for early-type (left column) and late-type galaxies (right column). The top panels shows the young population (t < 56 Myr), the central panels show the intermediate population (100 Myr < t < 2 Gyr), and the bottom panels show the old population (2 Gyr < t < 5 Gyr). Void galaxies are shown with dashed red lines, and non-void galaxies with solid gray lines. Error bars indicate the uncertainty in the mean, calculated as $\sigma /\sqrt{(}n)$. (a) ETGs. (b) LTGs.