| 研究実績の概要 |
First, I have carried out several experiments using the cueing paradigm (with Dr. Tamaoka at Nagoya University). Here, the question was whether the cue will facilitate naming at the target, and also whether there are brain patterns associated with this process. This work is still in progress as we found mixed results (some exp's showed facilitation, whereas others did not).
Second, I have co-authored a paper (Nakayama, Kinoshita & Verdonschot, 2016) investigating priming for low- and high-proficient bilinguals (LPB/HPB) when naming English words. Stimuli overlapped in the onset (bark - BENCH vs. dark - BENCH) or in the mora/CV (bell - BENCH vs. cell - BENCH). We found that only HPB and native speakers showed onset priming but not LPB. All groups showed (identical) CV and identity priming. We also found that immersion (not TOEIC score or onset of learning) explained this pattern best. An acoustic analysis showed that only LPB (and not HPB) JP-ENG bilinguals inserted vowels in English words (e.g. magnet becoming maGUnet[to]). I went to Macquarie University to continue collaboration on this line of research with Dr. Kinoshita.
Lastly, I have co-authored a publication (Tamaoka, Makioka,Sanders & Verdonschot, in press) providing a new and freely accessible database for scholars to use when working with the Japanese language. This database is very useful when selecting stimuli to investigate the production of speech sounds in Japanese as multiple readings for different kanji are listed together with their "on ratio" (i.e., how often a kanji is read in its on- or kun reading).
|
| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The research is going as planned although it took a bit longer than expected to obtain ethics approval for my experimental series. I am planning to carry out the planned behavioral and neurocorrelational experiments and I expect to be able to publish more papers resulting from my start-up proposal.
With respect to the KINECT part of my proposal: I have published a paper on how the KINECT can be used in psycholinguistic research (Verdonschot et al., 2015). I have talked about my ideas with Dr. Fujie (Chiba Institute of Technology) in FY2015 who I also gave this data and software. He has developed additional software which I have used to acquire preliminary test data. Presently, these data will have to be further processed. Possibly, a neural network will need to be trained to predict naming latencies among other variables and I hope to continue this collaboration. As such I cannot put an exact planning on the calendar until these data are further processed.
|
| 今後の研究の推進方策 |
I will investigate the use of the Stroop ink-color naming task (e.g. PINK < BLUE; note: both would be named as “pink”). In other domains than language this task has been shown to give large behavioral effects and seems to be more reliable than masked priming- and cueing tasks. I have started to investigate the use of this task in March 2016 and I aim to continue this line of research in FY2016. However, it is unsure whether this task is suitable for EEG as naming colors takes typically <500ms and the brain potential component of interest (the N400) is only 100ms before actual speech. Therefore, there may be large artifacts due to the motor response required in naming.
Secondly, I will use the picture-word naming task, a stoop task variant (widely used in language production research). Typically, in this task the word is read before the picture can be overtly named thereby affecting naming latencies. If phonology overlaps typically naming latencies are faster for the overlapping condition. So, in this way we can investigate whether Japanese native speakers plan their speech phoneme-by-phoneme (KAGI; koto/soto) or in moraic units (KAGI; kami/nami). This task is also well suitable for usage with EEG as the speech planning begins well before the utterance is spoken. I will cooperate with a lab which already has EEG equipment (e.g., at Nagoya with Prof. K. Tamaoka or at Waseda with Prof. H. Sakai).
Lastly, I will continue my ongoing collaboration with Prof. N.O.Schiller (Leiden University) on bilingual speech production and I will visit his lab in August 2016.
|
