I asked how many members’ phone numbers the teacher has programmed into his or cell phone. My suspicion was this. The growing groups would likely have more phone numbers programmed into their cell phone because they contact their group on a regular basis. They have made it easy on themselves to call members and say, “Let’s go get a pizza!” Turns out, my suspicion was right. Rapidly growing classes were more than twice as likely (112%) to have 10 or more class members’ phone numbers programmed into their cells.
It would be interesting to ask about how many potential members’ phone numbers the teacher has as well as to ask about email address, Facebook friends and so forth. Based on this data alone, it is not hard to guess.
Note: this is not based on a scientifically randomized survey. Rather it is based on a survey of people who volunteered to participate.