ALIS Newsletter - November 2022 (Plain Text Version)
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In this issue: |
ARTICLES WHAT TO TEACH, WHAT TO SKIP: A CORPUS STUDY OF VERB TENSE AND ASPECT IN SUCCESSFUL STUDENT WRITING Lily Lewis, National Defense University, Washington, DC, USA
Introduction Most of us in English for Academic Purposes (EAP) are not subject matter experts in the disciplines our students study. With little first-hand disciplinary knowledge, how can we decide what to emphasize in teaching disciplinary writing? We can certainly ask our students about their writing needs, but EAP students often have little or no experience writing in English in their chosen discipline. We might also try collaborating with other academic departments, but this is not always feasible. My research aims to supplement existing knowledge of disciplinary writing by analyzing the characteristics of successful student writing in various academic disciplines. Understanding verb tense/aspect (hereafter “TA”) is critical because students need to make decisions about TA in nearly every sentence, and errors in TA can obscure meaning and reduce cohesion, thereby negatively impacting evaluations of student writing (Hinkel, 2001). Previous studies in corpus linguistics have provided a strong foundation for understanding the use of TA. An analysis of tensed verbs in published academic writing (Biber et al., 2021) found that simple (unmarked) aspect is used in more than 90% of all verb phrases, perfect aspect is more frequent than progressive aspect, and perfect progressive aspect is quite rare. A study of student placement and diagnostic essays (Hinkel, 2004) suggests that present tense is more frequent than past, and past tense is more frequent than future. Much of the previous research on TA in student writing has been limited in scope (only one discipline or genre), level (only first-year writing), and/or size (small number of texts). Furthermore, nearly all prior studies have analyzed tense and aspect separately, without providing data on all 12 possible TA combinations (see Table 1). Future is labeled as a tense here, as is common in EAP materials, though linguists typically do not consider it a tense. Table 1 TA combinations in English.
My research questions are as follows: 1) Which TA combinations are most frequent in successful student writing? 2) How does TA usage vary by academic discipline? Corpus and Disciplines Used The Michigan Corpus of Upper-Level Student Papers (MICUSP) (Römer & O’Donnell, 2011) is a great resource for students, teachers, and researchers. The corpus consists of papers written by final-year undergraduates and graduate students from years one to three, representing different academic disciplines and including both L1 and L2 English speakers. All of the papers were written for the student's credit-bearing courses, and each received an “A” grade. One could argue that getting an A is not the only marker of a successful paper, and grammatical accuracy is probably not the most important factor in determining the grade. Nonetheless, these “A” papers can serve as models of successful upper-level writing in various academic disciplines. For this study, I limited my analysis to the 11 disciplines in MICUSP studied by at least 1% of U.S. international students, according to the U.S. Open Doors Report (Institute for International Education, 2021). These disciplines are: biology, civil and environmental engineering, economics, education, industrial and operations engineering, mechanical engineering, nursing, physics, political science, psychology, and sociology. This results in a total of 544 papers and 1,495,645 words. Corpus Searches I tagged the corpus with CLAWS7, a program that automatically labels the part of speech for each word. Once all of the texts had been tagged, I loaded them into Sketch Engine, a powerful corpus analysis tool known for its word sketch and advanced search features. I used Sketch Engine’s Corpus Query Language (CQL) concordance function to write searches for each of the 12 TA combinations. Table 2 gives an example of the search for future progressive, with a gloss to explain each item. Table 2 CQL search for future progressive
Findings The goal of this research was to determine the most frequent TA combinations in successful student writing and to explore how this usage varies in different disciplines. The results of the analyses are as follows: 1. Present simple is by far the most frequent TA combination, followed by past simple, present perfect, future simple, and present progressive. Table 3 Frequency and percentage of use for TA combinations totaled across all 11 disciplines.
2. The rates of use for TA combinations are different in student writing from specific academic disciplines.
When the corpus is divided into disciplinary subcorpora, the differences in TA use become apparent. These differences can be illustrated by looking at the rates of use for the two most frequent TA combinations, present simple and past simple. Figure 1 shows the percentage of tensed verbs in present simple for each discipline. Physics, economics, and sociology have the highest rates of use; nursing, political science, and industrial/operations engineering have the lowest. Figure 1. Rates of use for simple present in each of the 11 disciplines. Figure 2 shows the percentage of tensed verbs in past simple for each discipline. Industrial/operations engineering, biology, and mechanical engineering have the highest rates of use; sociology, economics, and physics have the lowest. Figure 2. Rates of use for simple past in each of the 11 disciplines. 3. Despite these differences, the most frequent TA combinations in student writing are quite consistent across all 11 disciplines. As can be seen in Table 4, present simple was the most frequent TA combination in all disciplines, followed by past simple. Present perfect and future simple ranked either third or fourth, and present progressive was ranked fifth in every discipline. Table 4 Ranking of TA combinations by frequency in each discipline.
Reflection & Discussion Although I already knew that some TA combinations were more commonly used than others, the degree to which they differ was still quite striking. From personal experience writing a chapter on future perfect for a grammar textbook, I had to write far more future perfect sentences in a single chapter than occurred in this study's entire corpus of 544 papers. How much should frequency data, like the results presented in this study, factor into pedagogical decisions? Arguably, frequency data can be very valuable. Focusing on less frequent items, like future perfect, may waste valuable instructional time on grammatical structures that students are unlikely to use or need. On the other hand, frequency should not be the only consideration when it comes to curriculum and materials design. Some low-frequency structures may be interesting, challenging, and/or especially relevant for a particular class, and therefore worth including. This study has aimed to inform the teaching of tense and aspect in EAP. With these results in mind, instructors can take students’ academic disciplines into account and focus on the most common TA combinations in successful student writing from those disciplines. In the absence of data for a particular discipline, the findings from the corpus as a whole may serve as a guide. For the reasons mentioned above, I would not advocate that we stop teaching the less frequent TA combinations altogether. However, we may first want to consider whether our students would be better served by directing their attention to more frequent grammatical items. References Biber, D., Johansson, S., Leech, G. N., Conrad, S., & Finegan, E. (2021). Grammar of spoken and written English. John Benjamins. https://doi.org/10.1075/z.232 Hinkel, E. (2001). Teaching grammar in writing classes: Tenses and cohesion. In S. Fotos & E. Hinkel (Eds.), New perspectives on grammar teaching in second language classrooms (pp. 183–199). Taylor & Francis. https://doi.org/10.4324/9781410605030 Hinkel, E. (2004). Tense, aspect and the passive voice in L1 and L2 academic texts. Language Teaching Research, 8(1), 5–29. https://doi.org/10.1191/1362168804lr132oa Institute for International Education. (2021). IIE open doors 2021: Fields of study. https://opendoorsdata.org/data/international-students/fields-of-study/ Römer, U., & O’Donnell, M. B. (2011). From student hard drive to web corpus (part 1): The design, compilation and genre classification of the Michigan Corpus of Upper-level Student Papers (MICUSP). Corpora, 6(2), 159–177. https://doi.org/10.3366/cor.2011.0011
Lily Lewis is a postgraduate researcher at the University of Birmingham and a Writing Instructor at National Defense University. Her research interests include academic writing, EAP, and corpus linguistics. |