Good question, Carl. That transition took place over a long period of time, and it primarily was due to geography. In areas where Christians lived within walking distance of the church (as in the city of Geneva), it was easy to gather there for daily prayer. In rural areas where they lived at quite a distance from the church, daily family worship took the place of daily worship at the church.

Good questions, Jonathan. I don’t think it’s correct to call Calvin an exclusive psalmodist, though he certainly favored the psalms over hymns. Both in Strasbourg and Geneva, he used non-inspired texts for songs … singing the Apostles’ Creed for example. I don’t know if Knox ever made an argument for exclusive psalmody, but he clearly followed Calvin’s example in singing the psalms. Early in his ministry, particularly when he was with Wishart, he would have used the Goode and Godly Ballads. As far as liturgical minimalism in Scottish Presbyterianism, that can most likely be traced back to the Puritan influence of Robert Browne (the Brownists) and Henry Barrow (the Barrowists). The covenanters were very much opposed to the use (and especially the imposition) of liturgical forms.