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Published online by Cambridge University Press: 19 February 2026
This article presents two questionnaire experiments that investigate the processing complexity of a variety of nested constructions in Japanese. The first experiment demonstrated that embedded structures containing a direct object NP in the most embedded clause were more complex than comparable nested structures that lacked an object NP in the most embedded clause. The second experiment demonstrated that a construction consisting of a relative clause embedded within a sentential complement is less complex than the reverse embedding, consisting of sentential complement embedded within a relative clause. These results are discussed in terms of the syntactic prediction locality theory (Gibson 1998).