One of the major challenges for universities is the lack of knowledge sharing among students (
54). Universities use knowledge sharing to help increase the efficiency and effectiveness of their community. This cross-sectional study provided detailed information on the validity and reliability of EELS in students. Lee et al.'s questionnaire has been expanded with the financial support of the Ministry of Public Education, and investigations confirmed content validity, convergent validity, divergent validity, and construct validity (with a sample of 737 students) (
32). In addition, the researcher has reported its reliability at a suitable level. On the other hand, a review of the references of this article showed that many studies published in the field of online courses in the last two years had used this tool to measure academic engagement (202 articles posted on reputable sites, such as PubMed, tandfonline, and Springer) (
55-
59). Therefore, this tool was used in this research to provide a reliable tool to assess academic engagement.
The analysis included a broad range of aspects of the scale, from the construct of the questionnaire (for which exploratory and CFA were used) to its content validity calculations, CVI, and CVR. In all cases, it provided very satisfactory results. Reliability was 0.95 for 24 items, and EFA was satisfactory. Regarding CFA, root mean square error of approximation (RMSEA), goodness of fit index (GFI), and comparative fit index (CFI) values were satisfactory, and factor loadings were all statistically significant. This finding is consistent with the study by Lee et al. (
32). This scale had a significant correlation with Schaufeli's academic engagement scale, and Lee's scale had a significant relationship with Schaufeli's academic engagement scale. Therefore, these two scales measure the same concept, and the Lee scale well measures academic engagement.
It should be noted that concurrent validity has not been investigated in the Lee scale. The AVE values were greater than 0.5, and the CR values were greater than 0.7. This indicates the convergent validity of the scale and is consistent with the original version (
32).
The final questionnaire included 24 items and four factors: (1) psychological motivation; (2) effective management and communication; (3) cognitive problem-solving; and (4) peer collaboration (Appendix 1). The first dimension: "Psychological Motivation," includes questions about learning, enjoyment, stimulating interest, course functionality, satisfaction with the course, learning expectations, learning expectations, and motivation. This dimension corresponds to the dimension presented in the main questionnaire (
32). It can be said that motivation is a prerequisite for learning, and the richest educational programs will not be useful in the absence of motivation (
60). Academic engagement in online classes will not be exempt from this issue, and psychological motivation is essential in academic engagement and can increase academic engagement in online classes.
The second dimension, "management and effective communication," includes questions regarding asking questions, belonging to the community, connection with peers, interaction with peers, self-directed study, managing own learning, and managing own learning schedule. As a possible explanation, it can be said that communication increases academic performance, and students who have communication skills establish positive relationships with their classmates and teachers and create a suitable environment for learning (
61). That is why communication is essential in online conflict. Moreover, management skills in students improve the motivation to learn, and they do not postpone their assignments and take control of the work processes (
62). Therefore, management skills are essential in academic engagement. This dimension entails items from the dimensions of "Interactions with Instructors," "Community Support," and "Learning Management." In explaining this combination, we can highlight the difference between education in Iran and South Korea.
In comparing the educational system of South Korea and Iran, the difference in acceptance could be noted. In South Korea, the admission of students in the field of nursing and midwifery is based on an entrance exam and evaluation of interest and ability to communicate (
63). In addition, coordination between goals and content in the educational program, providing lessons in line with creative and critical thinking, human relations, working in multicultural societies, and using evidence-based knowledge are distinctive and different features of the nursing education program. Teaching and using a comprehensive evaluation approach are also among the differences between nursing and midwifery education in South Korea and Iran (
34,
64).
Another explanation is the speed and infrastructure related to the internet. South Korea has one of the fastest and cheapest internet settings in the world, and its average internet speed reaches 28.6 Mbps (
65-
68). Iran, meanwhile, ranks 107th in the world with an average internet connection speed of 4.7 Mbps, and internet access is expensive for citizens (
69-
72). In some regions of Iran, there is no proper Internet infrastructure. The weakness of the Internet and the lack of access to it in Iran have led to the low participation of students in classrooms compared to South Korea. The involvement of students in online classes largely depends on how to use the facilities of online platforms (
73). The lack of internet infrastructure, low internet speed, and poor antenna coverage create many limitations in using the online platforms' features in online classes (
74). These problems are more visible in Iran due to internet outages, low internet speed, and filtering.
The third dimension. "cognitive problem-solving," encompasses questions concerning asking questions, deriving an idea, applying knowledge, analyzing knowledge, judging the value of information, and approaching a new perspective. This dimension is aligned with the dimension presented in the main questionnaire (
32). It can be said that learning based on problem-solving leads to deep learning, which is effective in the teaching process in which students collaboratively analyze educational issues and reflect on their experiences. The cooperation of professors and students in solving academic problems plays an essential role in the teaching-learning process, which results in improved personal learning skills (
75).
The fourth dimension, "peer collaboration," includes questions on requesting help, collaborative problem-solving, responding to questions, collaborative learning, and collaborative assignments. This dimension is aligned with the dimension presented in the main questionnaire (
32). It can be said that class participation can facilitate learning. However, in online learning, students must simultaneously "assess themselves," "set goals," "provide strategies to achieve those goals," and be concerned about their learning and progress (
76). Therefore, the participation of students in online classes facilitates these challenges, and this dimension was important in this research. To assess the internal reliability of the scale, this study examined the correlation between the total test score and each item, as well as Cronbach's alpha values for the scale and its dimensions (1) psychological motivation; (2) effective management and communication; (3) cognitive problem-solving; and (4) peer collaboration), which were found to be more than 70%. Additionally, the correlation between the total score and each item was significant, indicating good internal reliability. These findings are consistent with the results of the Korean version (
32). Moreover, this study confirmed that the scale has stable reliability by establishing a significant relationship between the two scale scores (test-retest), although the stability reliability of the Korean version has not been investigated yet.
One of the strengths of the present study was the selection of a large sample that increased the generalizability of the results. The second strength of the study was the use of cluster sampling methods from all universities in the country. Thus, considering the nature of sampling, it can be said that the random state and maximum variety of samples were maintained.
Among the limitations of this research is its validation in nursing and midwifery students. More caution should be taken in generalizing the results to other students. Therefore, it is suggested to validate this scale among other students. On the other hand, 78.41% of the participants in this research were undergraduate and associate degree students, which can lead to misuse of the results. Therefore, it is suggested to validate this scale among graduate students in research.
Our results supported the appropriate validity and reliability of the scale. This scale can help develop targeted interventions and improve student participation in e-learning by identifying the extent of student engagement in e-learning. The results of this study can also be used in designing online courses and evaluating the effectiveness of this teaching method.