@article{BosBastiaanse2014,
  author    = {Bos, Laura S. and Bastiaanse, Roelien},
  title     = {Time reference decoupled from tense in agrammatic and fluent aphasia},
  series = {Aphasiology : an international, interdisciplinary journal},
  volume    = {28},
  journal   = {Aphasiology : an international, interdisciplinary journal},
  number    = {5},
  publisher = {Routledge, Taylor \& Francis Group},
  address   = {Abingdon},
  issn      = {0268-7038},
  doi       = {10.1080/02687038.2014.886322},
  pages     = {533 -- 553},
  year      = {2014},
  abstract  = {Aims: The goal of this study is twofold. First, it aims to untangle tense problems from problems with past time reference through verb morphology in people with aphasia. Second, this study aims to compare the production of time reference inflection by people with agrammatic and fluent aphasia. Methods \& Procedures: A sentence completion task was used to elicit reference to the non-past and past in Dutch. Reference to the past was tested through (1) a simple verb in past tense and (2) a verb complex with an auxiliary in present tense + participle (the present perfect). Reference to the non-past was tested through a simple verb in present tense. Fourteen agrammatic aphasic speakers, sixteen fluent aphasic speakers, and twenty non-brain-damaged speakers (NBDs) took part in this study. Data were analysed quantitatively and qualitatively. Outcomes \& Results: NBDs scored at ceiling and significantly higher than the aphasic participants. Agrammatic speakers performed worse than fluent speakers, but the pattern of performance in both aphasic groups was similar. Reference to the past through past tense and [present tense auxiliary + participle] was more impaired than reference to the non-past. An error analysis revealed differences between the two groups. Conclusions: People with agrammatic and fluent aphasia experience problems with expressing reference to the past through verb inflection. This past time reference deficit is irrespective of the tense employed. The error patterns between the two groups reveal different underlying problems.},
  language  = {en}
}
@article{ArslanAksuKocMavisetal.2014,
  author    = {Arslan, Se{\c{c}}kin and Aksu-Koc, Ayhan and Mavis, Ilknur and Bastiaanse, Roelien},
  title     = {Finite verb inflections for evidential categories and source},
  series = {Journal of pragmatics : an interdisciplinary journal of language studies},
  volume    = {70},
  journal   = {Journal of pragmatics : an interdisciplinary journal of language studies},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0378-2166},
  doi       = {10.1016/j.pragma.2014.07.002},
  pages     = {165 -- 181},
  year      = {2014},
  language  = {en}
}
@article{BosHanneWartenburgeretal.2014,
  author    = {Bos, Laura S. and Hanne, Sandra and Wartenburger, Isabell and Bastiaanse, Roelien},
  title     = {Losing track of time? Processing of time reference inflection in agrammatic and healthy speakers of German},
  series = {Neuropsychologia : an international journal in behavioural and cognitive neuroscience},
  volume    = {65},
  journal   = {Neuropsychologia : an international journal in behavioural and cognitive neuroscience},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0028-3932},
  doi       = {10.1016/j.neuropsychologia.2014.10.026},
  pages     = {180 -- 190},
  year      = {2014},
  abstract  = {Background: Individuals with agrammatic aphasia (IWAs) have problems with grammatical decoding of tense inflection. However, these difficulties depend on the time frame that the tense refers to. Verb morphology with reference to the past is more difficult than with reference to the non-past, because a link needs to be made to the past event in discourse, as captured in the PAst Discourse Linking Hypothesis (PADILIH; Bastiaanse, R., Bamyaci, E., Hsu, C., Lee, J., Yarbay Duman, T., Thompson, C. K., 2011. Time reference in agrammatic aphasia: A cross-linguistic study. J. Neurolinguist. 24, 652-673). With respect to reference to the (non-discourse-linked) future, data so far indicate that IWAs experience less difficulties as compared to past time reference (Bastiaanse, R., Bamyaci, E., Hsu, C., Lee, J., Yarbay Duman, T., Thompson, C. K., 2011. Time reference in agrammatic aphasia: A cross-linguistic study. J. Neurolinguist. 24, 652-673), supporting the assumptions of the PADILIH. Previous online studies of time reference in aphasia used methods such as reaction times analysis (e.g., Faroqi-Shah, Y., Dickey, M. W., 2009. On-line processing of tense and temporality in agrammatic aphasia. Brain Lang. 108, 97-111). So far, no such study used eye-tracking, even though this technique can bring additional insights (Burchert, F., Hanne, S., Vasishth, S., 2013. Sentence comprehension disorders in aphasia: the concept of chance performance revisited. Aphasiology 27, 112-125, doi:10.1080/02687038.2012.730603). Aims: This study investigated (1) whether processing of future and past time reference inflection differs between non-brain-damaged individuals (NBDs) and IWAs, and (2) underlying mechanisms of time reference comprehension failure by IWAs. Results and discussion: NBDs scored at ceiling and significantly higher than the IWAs. IWAs had below-ceiling performance on the future condition, and both participant groups were faster to respond to the past than to the future condition. These differences are attributed to a pre-existing preference to look at a past picture, which has to be overcome. Eye movement patterns suggest that both groups interpret future time reference similarly, while IWAs show a delay relative to NBDs in interpreting past time reference inflection. The eye tracking results support the PADILIH, because processing reference to the past in discourse syntax requires additional resources and thus, is problematic and delayed for people with aphasia. (C) 2014 Elsevier Ltd. All rights reserved.},
  language  = {en}
}