One of the key elements of constraint-based formalisms is their ability to derive a variety of
effects from the interaction of general constraints. As for vowel harmony, one persistent
question within Optimality Theory is how to encode directionality–directly through directional
harmony-driving constraints, or indirectly through asymmetric prominence patterns. This
paper presents a typologically unusual case of progressive harmony triggered by prefixes in
Tutrugbu. We compare analyzing harmony as purely progressive in a direct sense with an …

One of the key elements of constraint-based formalisms is their ability to derive a variety of
effects from the interaction of general constraints. As for vowel harmony, one persistent
question within Optimality Theory is how to encode directionality, directly through directional
harmony-driving constraints, or indirectly through asymmetric prominence patterns. This
paper presents present a typologically-unusual case of progressive harmony triggered by
prefixes from Tutrugbu. We compare analyzing harmony as purely progressive in a direct …