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Qian and Schedl's Depth of Vocabulary Knowledge Test was administered to 31 native-speaker undergraduates under an "unconstrained" condition, in which the number of responses to headwords was unfixed, whereas a corresponding group (n = 36) completed the test under the original "constrained" condition. Results revealed lower accuracy in the unconstrained condition and in paradigmatic versus syntagmatic responses. Native speakers failed to reach the 90% criterion on most unconstrained and many constrained items. Although certain modifications could improve such a test (e.g., eliminating psycholinguistically anomalous headwords, such as adjectives, or presenting responses to headwords discontinuously), two intransigent problems impede test validity. First, collocates in the mental lexicon differ in tightness and vary across dialects, sociolects, and age groups. Second, it is more serious that second-language Depth of Vocabulary Knowledge Tests are likely spot checks of metalinguistic knowledge rather than depth tests that reflect what learners would actually produce in spontaneous utterances.The last two decades have seen a renewal of interest in vocabulary and a surge in the number of studies on second-language (L2) lexical acquisition. Despite this progress, L2 lexical studies frequently remain uninformed by current psycholinguistic research. Nowhere is this more evident than in the case of lexical testing and the linguistic and psycholinguistic frameworks within which lexical testing is conducted. Standardized, valid, and reliable vocabulary measures are still scarce, particularly so when one considers languages spoken outside the few countries able to sustain lexical testing research. As would be expected, the situation is the best in the case of English, for which there are now quite a few lexical tests

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This article reports the findings of a study in which transfer of verb properties was investigated via syntactic data elicited from second language (L2) learners. It was hypothesized that a learner's first language (L1) would influence the acquisition of verbs in those L2 semantic classes where so-called L1-L2 translation equivalents could be found. To investigate lexical transfer, the performance of Hindi-Urdu speakers on tests of English causatives was compared with that of Vietnamese speakers, because there are significant differences between causativization patterns in Hindi-Urdu and Vietnamese. To account for proficiency-based variation in performance, learners were placed in one of three levels of lexical proficiency in English, and Mann-Whitney comparisons were made between Hindi-Urdu and Vietnamese speakers at corresponding proficiency levels. It was found that the performance of the Hindi-Urdu and Vietnamese groups differed significantly in several semantic contexts. Generally, the results suggest that there is some transfer of semantic information from the L1 verb lexicon to the emerging L2 verb lexicon. More specifically, the findings suggest that verb properties are transferred selectively and that transfer plays a role in the difficulty or ease involved in the shedding of overgeneralized lexical rules.