Another thing to consider is societal expectations. Once one person starts clapping, there is sort of a domino effect. People feel pressured to join in because they don’t want to be the rude person standing there with their arms crossed over their chests.
LOL, this is so true. Someone tried to start a round of applause after the offertory hymn last Sunday. The thing is, is that the choir is really not that good. Anyways, someone tried, and it was met with stony silence from the rest of the congregation. (Church is sort of in an interesting spot, with lots loose liturgical types around, but also strongly orthodox people). I guess the founding pastor, started a practice at the end of Mass, after the priest recesses out, where whole congregation kneels and says an Our Father, a Hail Mary, and Glory Be, for the dead and those that will die today. I am guessing this practice was sort of restrained because of this.
I grew up in a “charismatic” parish, where the final song was often an upbeat, happy clappy song, not hymn, song, as the parish music consists of a band, drum set and all. (No offense really meant at the happy clappy comment, I have found memories of my childhood parish). So applause really was sort of continuation of the song, and there was some joy combined with appreciation for the music, and just following the crowd. There was a lot of social pressure in this particular parish to behave and act “charismatically.” Thus there was a lot of “speaking in tongues,” arms raised during songs as an act of praise an worship, being “slain in the spirit,” etc. Once the parish got a more sedate priest, who had more of a contemplative spirituality, many of these behaviors became limited to a select few people, or died out all together. So social pressure can indeed be very overwhelming, especially if the personality is strong, and clapping certainly applies.