Willingness to communicate (WTC) has been considered an important part of the language learning and communication process, playing a pivotal role in the development of language learners' communicative competence. Many studies have been conducted on the relationship between WTC and related variables in learning English as a foreign language. However, there is a lack of a comprehensive meta-analysis concerning the effect sizes of these studies. Thus, the present meta-analysis investigated the overall average correlation between L2 WTC and three key variables influencing foreign/second language learners' WTC, specifically perceived communicative competence, language anxiety, and motivation. The results of the meta-analysis indicated that all three variables were moderately correlated with L2 WTC, with perceived communicative competence having the largest effect. Finally, tests of the heterogeneity of the effect sizes indicated the possibility of the presence of the moderators which might play an influential role in the relationship of WTC with anxiety, perceived communicative competence, and motivation.

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Following the recent shift from negative psychology to positive psychology, interest in foreign language enjoyment (FLE) has grown noticeably in second language acquisition. Given the fact that learners are "persons-in-context" and are not "ergodic ensembles," the particular learner-context ecosystem goes through ongoing momentary changes with respect to individual differences like FLE. Ecological momentary assessment (EMA) contributes to our understanding of the dynamics of this ecosystem in terms of the interaction between individual learners and their learning environments. In this study, using a time-based sampling scheme of EMA, we explored the dynamism of different facets of FLE across different timescales including seconds, minutes, weeks, and months in a course of intermediate English as a foreign language. To do this, we applied open-ended interviews with two intermediate English language learners in a private English language institute across months, journals across weeks, enjoymeters across minutes, and the idiodynamic approach across seconds. Findings indicated that enjoyment in foreign language fluctuates in terms of a hierarchy of temporal scales, from moment-to-moment changes to the ones over months. The emerging patterns of enjoyment across different timescales in terms of the tenets of complex dynamic systems theory are discussed.

In line with the dynamic shift in SLA domain and the need for the development of suitable methods to explore the dynamics of emerging concepts in the field such as grit and enjoyment, in the present research, we intended to investigate the growth of foreign language enjoyment (FLE) and L2 grit over time. To do this, we used a bivariate latent growth curve model (LGCM) to examine the covariance between 437 EFL learners' initial and growth levels of L2 grit and FLE in four measurement occasions of 2 week intervals. The data were collected via the original foreign language enjoyment scale and the L2 grit scale. The model including the covariance between intercepts and slopes of FLE and L2 grit was tested via Mplus 7. The findings indicated an increasing trend in the association between the growth levels of both variables. That is, the means of both L2 grit and FLE were larger at their growth level than their initial level. Also, analyzing the co-variations in the model showed that the covariances between the intercepts and slopes of FLE and L2 grit were statistically significant. This would point to the existence of a parallel process (co-development) of FLE and L2 grit. This result also implied that an increase in the level of FLE among the participants was strongly correlated with an increase in the level of L2 grit during the whole course. The findings were discussed with reference to previous studies in the literature and the implications were also provided.

The tripartite of motivation‐ affect‐ cognition indicates the need for more efforts to uncover the complex nature of the interplay of self‐efficacy, anxiety as well as motivation. In this study we measured the longitudinal association between adult English a foreign language (EFL) students’ self‐efficacy and anxiety and the role of ideal self as the predictor of this association. To do this, we applied Latent Growth Curve Modeling (LGCM) to analyze data collected from 367 undergraduate students within a 4 time period during a semester in a course of general English. The findings indicated that while adult students’ self‐efficacy increased significantly, their level of anxiety decreased during the semester. However, the significance of the intercept and slope variances for both variables implied heterogeneity in the students’ growth in self‐efficacy and anxiety over the semester. In addition, at the beginning of the semester, the significant negative correlation between adult students’ self‐efficacy and anxiety was low but during the semester the negative correlation between the two variables turned out to be high. Furthermore, adult students’ ideal self could only predict the rate of change in their self‐efficacy and anxiety over time, and not their initial level. The qualitative data provided further insights into adult learners’ change in their states of self‐efficacy and anxiety detected primarily by the LGCM phase.