Knowledge of derivational affixes makes an important contribution to second language learners' success when reading. Yet while the effects of some learner variables (L2 proficiency, L1 background) have been investigated, there has been little research addressing the effects of varying characteristics of affixes on their acquisition. The goal of…

Convergent evidence suggests that, for bilingual learners, well-developed morphological awareness in the first or second language may facilitate second language reading comprehension. However, there may be important differences between types of morphological awareness which could affect the degree to which second language reading comprehension is…

We are encouraged by Cobb's (2022) description of changes to the Morpholex profiling tool (https://www.lextutor.ca/cgi-bin/morpho/lex/) resulting in more accurate word classifications. This addresses one point in our recent commentary on Morpholex and on Laufer and Cobb's (2020) study using Morpholex (McLean & Stoeckel, 2021). However, Cobb…

Advances in Natural Language Processing (NLP) over the past decade have largely been driven by the scale of data and computation used to train large neural network-based models. However, these techniques are inapplicable to the vast majority of the world's languages, which lack the vast digitized text datasets available for English and a few other…

Building on Jack Richard's interest in vocabulary, this paper looks at the importance of morphology (how words are formed) in language learning and teaching. It describes why knowledge of morphology is important, and how it affects vocabulary learning. It provides clear guidelines on what word parts to focus on, how much time to spend on word…

The current study reported an empirical investigation that tested the collective and individual effects of morphological awareness and cognate awareness on Japanese word learning among Chinese learners of Japanese. 131 Chinese learners of Japanese participated in this study. They completed morphological awareness measurements (morpheme…

Very few studies have investigated second language (L2) knowledge of word parts. The present study was set to measure L2 recognition of 35 English prefixes and the factors that might predict scores. The form and meaning sections of Sasao and Webb's Word Part Levels Test were administered to 152 Arabic learners of English as a foreign language…

This study investigated the effect of derivational suffix instruction on vocabulary knowledge. Fifty-eight high school learners were recruited to participate in the study. The learners were divided into control (n = 29) and experimental (n = 29) groups. The experimental group received a Fundamental English II course with an emphasis on…

EL1 learners' receptive morphological words (root, inflected, and derived words) develop on different scales, but whether they develop similarly in EFL learners' language production is still unknown and deserves an examination. The answer may provide a clue to theoretical controversy about whether language learners' morphologically defined words…

This study explored the role of morphological awareness and vocabulary knowledge in reading comprehension ability of Chinese as a second language (CSL) learners. Two-hundred and nine CSL students participated in this study and completed a series of measures including two tests of morphological awareness (morpheme discrimination test and compound…

This study investigated the relative contributions of English morphological and vocabulary knowledge to second language (L2) reading comprehension among 100 adult Japanese English as a foreign language (EFL) learners. The study also investigated the extent to which the roles of morphological and vocabulary knowledge in L2 reading comprehension…

In second language (L2) research, the lexical unit is often defined as a base word plus inflectional and derivational forms through Level 6 of Bauer and Nation's framework (WF6). WF6 use has been justified by the assumption that once a form is known, recognition of other WF6 members requires little extra effort. A more lenient view holds that an…

This study explored the role of word knowledge dimensions in second language (L2) word-meaning inference. College-level L2 learners (N = 121) participated in this study and completed a series of word knowledge tests including vocabulary size, word associates, morpheme-form knowledge, morpheme-meaning knowledge, morpheme discrimination, and…

Most common words in English have multiple different meanings, but relatively little is known about why children grasp some meanings better than others. This study aimed to examine how variables at the child-level, wordform-level, and meaning-level impact knowledge of words with multiple meanings. In this study, 174 children aged 5- to 9-years-old…

It is assumed by many teachers and materials writers that it is important to teach at all levels the forms and meanings of derivational prefixes and suffixes, as an important aid to learning new words in English. However, corpus evidence suggests that knowledge of the meanings of such components occurring within the most common 5,000 words in…