Is it possible to change the answer swipe direction on Android 4.3, Motorola Moto G, or Samsung Galaxy S4?
I know that Android 4.1, 4.2 and 4.3 don't allow that by default (i.e, there is no setting for it.) You could, however, get another dialer or locker app. GO Locker is both a great locker and dialer, but it can get annoying, as it sometimes needs you to answer the Android OS dialer screen as well.