A. Beretta et al., THE DERIVATION OF POSTVERBAL SUBJECTS - EVIDENCE FROM AGRAMMATIC APHASIA, Natural language and linguistic theory, 14(4), 1996, pp. 725-748
The study reported in this paper appeals to data from agrammatic aphas
ia to confront two competing analyses of the derivation of postverbal
subjects in languages which permit free inversion. In one of the analy
ses, postverbal subjects are derived by movement, while in the other,
they are base-generated in situ.According to a prominent hypothesis wh
ich attempts to explain the pattern of sparing and loss in agrammatism
in terms of current linguistic theory, the only syntactic deficit is
the loss of trace. This movement-derived 'trace-deletion' hypothesis h
as been successful in predicting what agrammatics can and cannot compr
ehend. In the present study, these predictions are first of all confir
med for Spanish-speaking agrammatics on a range of structures for whic
h predictions are identical under both movement and non-movement analy
ses. These structures serve as a control, establishing that the claims
of the trace-deletion hypothesis are valid. They pave the way for the
critical test of the VS passive, the only structure for which the com
peting analyses yield different predictions. Agrammatic data on the VS
passive are used to adjudicate between the competing analyses. Since
agrammatic subjects perform randomly on VS passives, it is concluded t
hat the postverbal subject is derived by movement.