Ch.12 A Perceptual Bridge Between Coronal an Dorsal /r/

12.1
Why would [r]change into [R] (or vice versa)
How does sound change begin?
Perception affects place of articulation
Purpose---examine the perceptual preconditions for reinterpretation of place of articulation.
Establish an articulatory-acoustic reference system
Evaluate the articulatory -aoustic relationships
Synthesize an /r/ continuum