This paper studies two aspects of movement in relative clauses, focusing on evidence from Nez Perce. First, I argue that relativization involves cyclic A' movement, even in monoclausal relatives: the relative operator moves to Spec,CP via an intermediate position in an A' outer specifier of TP. The core arguments draw on word order, complementizer choice, and a pattern of case attraction for relative pronouns. A' cyclicity of this type suggests that the TP sister of relative C constitutes a

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... e -a result whose implications extend to an ill-understood corner of the English that-trace effect. Second, I argue that Nez Perce relativization provides new evidence for an ambiguity thesis for relative clauses, according to which some but not all relatives are derived by head-raising. The argument comes from connectivity and anticonnectivity in morphological case. A crucial role is played by a pattern of inverse case attraction, wherein the head noun surfaces in a case determined internal to the relative clause. These new data complement the range of existing arguments concerning head-raising, which draw primarily on connectivity effects at the syntax-semantics interface. * Fieldwork for the Nez Perce portion of this project was conducted in Lapwai, Idaho, from 2007-2014. I gratefully acknowledge Nez Perce elders Bessie Scott and Florene Davis for sharing their language with me. I would also like to thank audiences at UC Santa Cruz, UMass, McGill, UCLA, and WCCFL 33; Pranav Anand, Rajesh Bhatt, and Michael Diercks; and two anonymous LI reviewers, for many useful comments and suggestions. 1 The following abbreviations are used in Nez Perce glosses: ACC accusative case (equivalent to the case glossed as 'objective' in Crook (1999), Deal (2010a) et seq.), AGR agreement, AGT agentive nominalization, ATTRIB attributive, C complementizer, CAUSE causative, DUNNO speaker ignorance marker, ERG ergative case, FREQ frequentative deverbal adjective suffix, GEN genitive case, IMP imperative, INST instrumental case, LOC locative case, NOM nominative case, RP relative pronoun, TAM tense/aspect/mood, Y.N yes/no question particle, µ functional head present in possessor raising (Deal, 2013a), 1SG (etc.) 1st person singular (etc.), 3REFL (etc.) 3rd person reflexive (etc.). Features of missing arguments are glossed according to the speaker's translation. Word order in Nez Perce is highly flexible (Rude, 1992) ; for ease of reading, gaps and null arguments are presented in an SVO order.