Do finger position markers actually help the performance of beginning students?
The most recent study of this issue (Louis Bergonzi, Effects of Finger Markers and Harmonic Context on Performance of Beginning String Students, Journal of Research in Music Education, 1997, v.45, no. 2) concluded that students using finger position markers played much better in tune compared to students not using them. Their long tradition of acceptance in violin pedagogy is indicated by the fact that the 3 great baroque treatises on violin playing (Francesco Geminiani, Michel Corrette, and Leopold Mozart) recommend their use.