The present research aimed to explore the dynamic growth of two emotional constructs: foreign language enjoyment (FLE) and foreign language learning boredom (FLLB) among L2 learners. To do so, we used a method that would capture the inherent dynamicity of L2 learners’ enjoyment and boredom during an EFL course. To this aim, a bivariate latent growth curve model (LGCM) was employed to examine the covariance between 412 EFL learners’ initial and growth levels of FLE and FLLB on four measurement occasions at two-week intervals. To collect the data, the original FLE scale and the newly developed FLLB scale were used. The model including the covariance between intercepts and slopes of FLE and FLLB was tested in Mplus 7. The analysis of the data revealed that the covariance between the intercept and slope of the FLE and FLLB was statistically significant and negative. This attests to the existence of a parallel process (co-variance) of FLE and FLLB, which indicates that an increase in the level of FLE among the participating L2 learners was strongly associated with a decrease in the level of FLLB during the whole course. The findings and implications are discussed in light of the existing literature.

中文翻译：

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外语享受与无聊的纵向研究：潜在增长曲线模型

本研究旨在探讨二语学习者两种情绪结构的动态增长：外语享受（FLE）和外语学习无聊（FLLB）。为此，我们使用了一种方法来捕捉 L2 学习者在 EFL 课程中享受和无聊的内在动态性。为此，采用双变量潜在增长曲线模型 (LGCM) 来检查 412 名 EFL 学习者的 FLE 和 FLLB 在四个测量场合的初始水平和生长水平之间的协方差，每两周一次。为了收集数据，使用了原始的 FLE 量表和新开发的 FLLB 量表。在 Mplus 7 中测试了包含 FLE 和 FLLB 的截距和斜率之间的协方差的模型。数据分析表明，FLE 和 FLLB 的截距和斜率之间的协方差具有统计学意义且为负。这证明了 FLE 和 FLLB 的并行过程（协方差）的存在，这表明参与的 L2 学习者中 FLE 水平的提高与整个课程中 FLLB 水平的下降密切相关。根据现有文献讨论了研究结果和影响。