Clause size, cross-clausal dependencies, and the left periphery

I investigate the interaction of Ā-movement, long-distance agreement (LDA), and clause type in Passamaquoddy (Eastern Algonquian) as a lens into the structure of the left periphery. I observe that we must distinguish three LDA patterns in the language: (i) LDA into complements of verbs like 'kocicihtun ‘know’ (“epistemic complements”), which is generally free (i.e. not A-local), but is restricted to the wh -DP under long-distance wh -movement; (ii) LDA into direct perception complements, which is always free, even when long-distance wh -moving a DP; and (iii) LDA into complements of verbs like 'pawatomon ‘want’ (“subordinative complements”, featuring verbs inflected in the subordinative verbal paradigm), which is always subject to A-locality, even when long-distance wh -moving a DP. I propose that these three patterns arise from independently-diagnosable differences in clause size: epistemic complements are full, phasal CPs, direct perception complements are reduced, nonphasal CPs, and subordinative complements are (nonphasal) bare TPs.