By "traditional," I mean that form of the Psalter with the inventory and sequence of Psalms received in the living Jewish and Christian traditions. In this article I am discussing when this traditional arrangement as a whole first materialized. Whether you call this first written instantiation the "original" of the collection or not is somewhat immaterial, because the "original" inscriptions of most of these Psalms (and possibly also many subcollections) long preceded the stage of development I am discussing here. Many individual Psalms have points of connections with earlier written material that should be considered on a case by case basis, but this does not substantively affect the question of the date of the collection. Hope that helps clarify.
By "traditional," I mean that form of the Psalter with the inventory and sequence of Psalms received in the living Jewish and Christian traditions. In this article I am discussing when this traditional arrangement as a whole first materialized. Whether you call this first written instantiation the "original" of the collection or not is somewhat immaterial, because the "original" inscriptions of most of these Psalms (and possibly also many subcollections) long preceded the stage of development I am discussing here. Many individual Psalms have points of connections with earlier written material that should be considered on a case by case basis, but this does not substantively affect the question of the date of the collection. Hope that helps clarify.