It has been observed that there is a strong association between the
inherent (lexical) aspect of verbs and the acquisition of tense-aspect
morphology (the aspect hypothesis; Andersen & Shirai, 1994). To investigate why such an association is
observed, this study examined the influence of inherent aspect and
learners' first language (L1) on the acquisition of Japanese
imperfective aspect by using two tasks—an acceptability judgment
test and an oral picture description task—with two groups of second
language learners of Japanese: 26 native speakers (NSs) of English, which
has the obligatory progressive, and 35 NSs of languages that have no
obligatory progressive marking (German and Slavic languages). The results
from the acceptability judgment test support the aspect hypothesis in
that, regardless of L1, the imperfective marker -te i-ru was
strongly associated with activity verbs for lower proficiency learners.
However, the results from the oral task did not support the prediction, in
that lower proficiency L1 nonprogressive learners did not show any such
preference. The results suggest that L1 plays a role in the formation of
the acquisition pattern predicted by the aspect hypothesis, but that given
the complex interaction with task types and proficiency, L1 transfer
cannot be the sole reason for the predicted association in the acquisition
of Japanese -te i-(ru). It is argued that multiple factors are at
work when learners create the form-meaning associations predicted by the
aspect hypothesis.This article is based on
research conducted as part of Sugaya's doctoral dissertation
submitted to Ochanomizu University. We would like to thank Kevin Gregg,
Yoshinori Sasaki, and the anonymous SSLA reviewers for their
insightful comments on an earlier version of this article. We also thank
Manabu Kurosawa for his invaluable advice on statistical analysis. We are
grateful to Chie Morizuka, Hiromi Ozeki, Masuyo Sugiyama, Orie Takahashi,
Yoko Mukoyama, Yukari Hashimoto, and the other participants of the seminar
on SLA at Ochanomizu University for their helpful discussions of this
study. We also thank the participants in the study for their cooperation
and those who kindly helped us recruit them. This research is partially
supported by a grant from the Japan Society for the Promotion of Science
(Developmental Index for Japanese L1 and L2 Acquisition and Comparative
Research on the Acquisition of English and Japanese, grant No. 13410034,
PI-Kiyoshi Otomo, Tokyo Gakugei University). A preliminary analysis of the
acceptability judgment test appeared in Nihongo Kyooiku (Journal
of Japanese Language Teaching; Sugaya, 2004).