This is a confusing issue. My son makes it more confusing because sometimes he needs it through all the stages, sometimes just the first 20 min, sometimes just the 45 min transition time, and sometimes the 45 min mark all the way to the end of the nap. I can't figure it out either. But somebody on here told me not to worry about doing so much shh/patting at this age, it's okay if they need the extra help. Once he seems to not need you so much try not doing it as much, maybe just the first nap of the day and see how he does.