This study presents a cross‐sectional and longitudinal analysis of how 108 high school students in English as a foreign language (EFL) classrooms enhanced the comprehensibility of their second language (L2) speech according to different motivation, emotion, and experience profiles. Students’ learning patterns were primarily associated with their emotional states (anxiety vs. enjoyment) and secondarily with their motivational dispositions (clear vision of ideal future selves). Students’ anxiety together with weaker Ideal L2 Self related negatively to their performance at the beginning of the project—performance that they had achieved after several years of EFL instruction. Students’ enjoyment together with greater Ideal L2 Self predicted the extent to which they practiced and developed their L2 speech within the 3‐month framework of the project. Results suggest that more frequent L2 use with positive emotions directly impacts acquisition, which may in turn lead to the lessening of negative emotions and better long‐term L2 comprehensibility. Open Practices This article has been awarded an Open Materials badge. Study materials are publicly accessible in the IRIS digital repository at http://www.iris-database.org. Learn more about the Open Practices badges from the Center for Open Science: https://osf.io/tvyxz/wiki.

Abstract-To remedy the paucity of studies on the relationship between vocabulary knowledge and speaking proficiency, we examine the degree to which second language (L2) speaking proficiency can be predicted by the size, depth, and speed of L2 vocabulary among novice to intermediate Japanese learners of English. Studies 1 and 2 administered vocabulary tests and a speaking test to 224 and 87 L2 learners, respectively. Analyses using structural equation modeling demonstrated that a substantial proportion of variance in speaking proficiency can be explained by vocabulary knowledge, size, depth, and speed. These results suggest the centrality of vocabulary knowledge to speaking proficiency.

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A meta-analysis was conducted on the effects of multiple-choice and open-ended formats on L1 reading, L2 reading, and L2 listening test performance. Fifty-six data sources located in an extensive search of the literature were the basis for the estimates of the mean effect sizes of test format effects. The results using the mixed effects model of meta-analysis indicate that multiple-choice formats are easier than open-ended formats in L1 reading and L2 listening, with the degree of format effect ranging from small to large in L1 reading and medium to large in L2 listening. Overall, format effects in L2 reading are not found, although multiple-choice formats are found to be easier than open-ended formats when any one of the following four conditions is met: the studies involve between-subjects designs, random assignment, stem-equivalent items, or learners with a high L2 proficiency level. Format effects favoring multiple-choice formats across the three domains are consistently observed when studies employ between-subjects designs, random assignment, or stem-equivalent items.

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