Research has been investigating the role of reading, as one source of input, in language learners' vocabulary development. The present study was designed to examine whether intermediate learners incidentally (a) acquire and (b) retain unknown vocabulary as a result of reading. The study further assessed (c) the effect of the text variable of exposure frequency. Learners were exposed to unfamiliar words either two, four, or six times during reading. Vocabulary acquisition and retention measured productive and receptive knowledge gain. Results indicated that only two encounters with unfamiliar words during reading significantly affected learners' vocabulary growth. Moreover, two or four exposure frequencies resulted in fairly similar word gain, but six exposures produced significantly more vocabulary knowledge. Retention measures showed mixed results: On productive vocabulary knowledge only half of the subjects displayed a significant rate of retention. On receptive knowledge all but one experimental group retained vocabulary over 4 weeks.

Research on second language lexical development during reading has found positive effects for word frequency, the provision of glosses, and elaborative word processing. However, findings have been inconclusive regarding the effect of such intervention tasks on long-term retention. Likewise, few studies have looked at the cumulative effect of interventions on word learning or text comprehension. This investigation sought to assess the effect of increased frequency of target words (TWs) comparing lexical gain of words that occurred once (F1) or four times (F4) in the input passage. The study further investigated the combined effect of frequency (F4) and semantic or visual enhancements. It compared the following reading conditions: (a) TWs were glossed four times in the text (four-gloss: 4G); (b) TWs were first glossed, then retrieved in the first language, and bolded twice (gloss-retrieval: GR); and (c) TWs were first glossed and then bolded three times (gloss-bolding: GB). In addition, the study assessed the effect of these interventions on long-term retention (4-6 weeks) of lexical knowledge and on text comprehension. Findings revealed that the GR and 4G reading conditions resulted in more productive word gain than the GB condition or when readers encountered a TW only once. Repeated visual enhancements seemed to have no effect on strengthening word encoding. The comprehension of main ideas was highest when the TW was glossed four times followed by the gloss-bolding reading condition and the gloss-retrieval task.Textual input is generally assumed to be an important source for second language (L2) lexical development because reading fosters L2 learners' fluency in word recognition (e.g., Hulstijn, 2001), and texts provide readers with meaningbearing, semantically, syntactically, and pragmatically rich input (e.g., Krashen,

The objective of the study was to determine the effect on lexical acquisition and retention of: (a) L1 multiple-choice glosses, (b) L2 text reconstruction with opportunities to recheck input and (c) combined treatments. These treatments were chosen for the following reasons: multiple-choice glosses are said to require ‘mental effort’, increasing the likelihood of retention. Reconstructing the text in the L2 may prompt learners to notice ‘holes’ in their lexicon and focus their attention on subsequent input. Seventy-six fourth-semester learners of German read a text in one of the four conditions (3 experimental; 1 control). Productive and receptive word gains were tested immediately after the treatment and again five weeks later. Findings suggest that the multiple-choice gloss treatment resulted in significantly deeper productive and receptive word gains immediately after the treatment. A significant receptive word gain was retained for five weeks only for the combined treatment condition.

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This investigation assessed whether L2 readers' sensitivity towards a new lexical form is heightened if they are repeatedly pushed to produce output and are immediately provided with relevant input in input-output cycles. In addition, the study sought to assess how these interventions influence text comprehension. Fourth-semester learners read three texts, with four target words each, under the following conditions: (a) cued-output task, (b) self-selected output task, and (c) un-enhanced (control) reading. Results showed that four input-output cycles did not contribute to retain more or more robust form-meaning connections (FMCs) than the normal reading condition. In all three conditions, FMCs varied in strength and completeness, requiring different cues for retrieval. The two input-output tasks affected text comprehension differently. The self-selected output task resulted in text comprehension similar to the un-enhanced reading; the cued-output task seemed to interfere with text comprehension.