## 3 Result Analysis
### Document Collection Analysis  
This study examines 32 documents that focused on the use of intelligent tutoring systems within augmented reality and virtual reality environments. As can be seen in Table 1, the documents were published during the period of 2015-2024 in 29 different sources by 114 authors from 19 countries. Most documents were published as Journal articles (\(n=16\)), followed by Conference/Proceedings papers (\(n=13\)) and Book chapters (\(n=3\)). Among the sources, _Computers & Graphics_ (\(n=2\)), _Education and Information Technologies_ (\(n=2\)), and _International Journal of Artificial Intelligence in Education_ (\(n=2\)) had the most documents that were relevant to the field, while the remaining 26 sources had each published a single relevant document. The documents were written by 4.03 co-authors on average and only two documents were single-authored. Additionally, the documents displayed a 25.38% annual growth rate, received 25.38 citations on average, and had an average age of 4.03 years. Finally, collaborations among countries were observed with the international co-authorship rate being 21.88%. Based on Table 2, most documents were published in 2023 (\(n=8\)), followed by those published in 2024 (\(n=6\)) and 2018 (\(n=5\)). These outcomes highlight the steady progress of the field and it receiving more emphasis when related technologies present significant advancements. Given the number of citable years and the mean total citations per year and document, it is evident that the initially published documents have set the foundations for this field of study to advance. Figure 2: Document distribution according to type. Although the 32 documents were written by 114 authors, most of them contributed to 1 document (\(n\) = 103 documents, 90.4%) while only a few contributed to either 2 (\(n\) = 7 documents, 6.1%) or 3 (\(n\) = 4 documents, 3.5%) documents. When looking at the countries of the authors, the corresponding author's country was considered. However, in cases where a corresponding author was not clearly specified, the country of the first author was taken into account. Of the 18 countries, those that published two or more documents are presented in Table 3. Specifically, the United States (\(n\) = 5) had the most published documents and presented the highest intra-country (SCP) collaboration. Australia, India, Spain, and Switzerland each published three relevant to the topic documents, while Germany published two relevant documents. The remaining 13 countries each contributed one document. Additionally, Figure 3 presents the distribution of studies based on the country and category. Based on the outcomes, India (\(n\) = 2) and Germany (\(n\) = 2) contributed the most Theoretical and Review studies, Spain (\(n\) = 2) contributed the most Proposal and Showcase studies, and the United States (\(n\) = 4) and Switzerland (\(n\) = 3) contributed the most Experimental and Case studies. Finally, when looking at collaborations among the countries, six clusters of collaborations emerged, as can be seen in Figure 4. The specific clusters are as follows: Red cluster--Australia, New Zealand, and the United States; Green cluster--Mexico and Spain; Purple cluster--China and Switzerland; Blue cluster--Germany and Thailand; Brown cluster--France and Italy; and Orange cluster--India and the United Arab Emirates. These outcomes highlight the global interest in this field of study, its multidisciplinary nature, and the need to establish more international collaborations to further advance it.