A Content and Citation Analysis of the Studies on Learning Environments and Special Education

This study aims to review the studies on learning environments and special education and determine the trends in these studies. Content and citation analysis were used which is a qualitative research method. Data of the study were collected from Scopus with ‘learning environment’ and ‘special education’ keywords 180 documents were collected. For the analysis of the published documents, previously determined content analysis criteria were used and citation analysis of the published documents were carried out, in order to reveal the frequently cited documents. Documents were examined based on year of publication, name of the journals, authors, affiliations, countries, document type, subject area, keywords, language and citations. Data were presented and interpreted with tables and figures. Results were presented in detail with reference to the previous literature.


Introduction
Educational opportunities provided to students with special needs are increasing day by day and more students in the last decade benefit from these possibilities (Coskun and Mitrani, 2020;Lewis, Wheeler and Carter, 2017). In the past, when it comes to education of students with special needs, it was considered that education should be in separate schools and students would be placed in schools or special education classes. On the other hand, mainstreaming and inclusive practices have increased in recent years and students with special needs have the opportunity to receive education with their peers and participate in social life more frequently (Gozun and Yikmis, 2004;Kaya et al., 2017). In order to meet the educational needs of individuals in need of special education, instructional practices are adapted for them in line with their diagnosis, disability characteristics and needs (Akcamete, Kayhan and Yildirim, 2017;Ozcan and Merdan, 2016).
The aim of the training of special needs individuals is to ensure that individuals with special needs are as independent as possible in their lives and that they can maintain a qualified life (Ardic, 2014). Special adaptations are required for educational environments for children with special needs. Therefore, in order for their needs to be met, it is necessary to know well who these children are and how their needs will be met. The characteristics of the individuals in the total disability group show differences. Dixon et all., (2014) stated that it is very important to know the characteristics of the individuals well, to evaluate the individuals correctly, to determine the performance levels well, to place them in the appropriate educational environments, to prepare the appropriate training programmes and to support them.
Evaluation in special education is the process of collecting data to determine the academic, behavioural or physical characteristics of individuals and make decisions according to those characteristics. It includes the systematic compilation of important information in terms of education to be used to make legal and educational decisions regarding the provision of special services and determine learning objectices (Avcioglu, 2016;Bateman and Bateman, 2014). Today, evaluation in special education is shaped by the individual needs of each student with special needs. After an appropriate evaluation process and decision regarding the needs of the students with special needs, individualized education programmes will be prepared to increase and improve the performance level of the students to be able to gain functional skills, live and maintain their daily lives independently. Learning environment is A Content and Citation Analysis of the Studies on Learning Environments and Special Education very important for improving learning and teaching practices (Ince and Costu, 2018) and based on a comprehensive evaluation process, learning environments could be designed and prepared for students with special needs. In addition, Sancar, Tozkoparan and Odabasi (2017) reviewed content analysis of scientific articles on the use of mobile technologies in special education.
According to the regulation of special education services in Turkey and based on the various legislations worldwide, educational evaluation and diagnosis are done at an early age (Milli Egitim Bakanligi, 2006;Sahin and Koca, 2017). Educational evaluation and identification are achieved through assessing the individual's characteristics in all developmental areas and their academic qualifications in the disciplinary fields and educational needs together. It is very important to provide physical, social, educational and psychological care for the individual in the most appropriate environment (Mostafa, 2017).
In recent years, one of the most discussed topics in the field of special education has been the provision of services in the least restrictive environment. The least restrictive educational environment principle is that needs of students with special needs should be placed in an educational environment that will ensure that it will meet the needs of the students in the most appropriate ways. Individual learning environments need to be sufficient and inadequate for the needs and characteristics of the invidiuals with special needs (Crockett and Kauffman, 2013;Taylor, 2004;Sabayleh and Alramamneh, 2020).
Educational evaluation is also a part of the ongoing interdisciplinary effort to understand the needs of individuals with special needs. Evaluation in special education is a teamwork and this team involves a special education teacher, a psychologist, a speech therapist and other professionals working in the field of special education (Howe and Miramontes, 2015;. As it can be seen, the evaluation process and learning environments in special education have a crucial place. Therefore, examination of the results of scientific research on this subject and identification of trends in this area will reveal the current situation and development, and it is expected that this would provide a guidance for further special education research and practices, especially in terms of providing appropriate learning objectives and environments for individuals with special needs. Therefore, this study aims to review the studies on learning environments and special education and determine the trends in these studies.

Research model
Content analysis and citation analysis as one of the most frequently used qualitative research methods were used in this study. According to Vasiliene-Vasiliauskiene et al., (2020), Cohen, Manion and Morrison (2007), content analysis is the process of summarizing and expressing the basic contents of the verbal or written information and the messages they contain. It is aimed to reveal the hidden truths contained in the data and definition of the data through content analysis (Gulbahar and Alper, 2009;Inaltekin, 2020). Content analysis involves four stages: processing of qualitative research data obtained from documents, organisation of the data and interpretation of findings (Zaid, 2020;Uzunboylu and Beheshti, 2017). Nevertheless, citation analysis has become prevalent as a parameter for evaluating the quality of published research in a specific field, and it reveals the historical and current situation of the research in that field (Atilgan, Atakan and Bulut, 2008;Leung, Sun and Bai, 2017).

Data collection
Data of the study were obtained through searching Scopus with 'learning environment' and 'special education' and relevant documents were included in the study. Learning environments and special education search page in Scopus is provided in Figure 1.

Data analysis
Content analysis criteria were indicated to review the collected data. The criteria were year of publication, name of the journals, authors, universities, countries, document type, subject area, keywords and language. In addition, most cited papers were also identified and mentioned in the results. 180 documents were analysed based on the collected data. Results were examined according to content analysis criteria.  1985,1986,1987,1994,1999 Table 1. Name of the journals in which the documents published Table 1 shows the name of the journals in which the documents related with learning environments and special education were published. The first 19 journal names are shown in the table, because the frequency of other journals was one and these journals constituted 43.33% of the 180 documents. The highest number of publications is in European Journal of Special Needs Education (f = 20, 11.11%). This result is followed by Lecture Notes in Computer Science with seven publications (3.89%); International Journal of Inclusive Education with six publications (3.33%) and Remedial and Special Education with five publications (2.78%).

Results on the names and affiliations of the authors
Results on names and affiliations were not shown in table or figure, because their frequencies were one or two and it would not be possible to demonstrate in a table or figure. According to the results, Oslo University and Helsinki University are the mostly observed academic institutions which are mentioned as affiliations in the published documents and the others were only with one and two frequencies. No steady trend was observed in the names and affiliations of authors.  Figure 3.

Countries of the publications
Distribution based on the countries of the publications is presented in Figure 3. The top 10 countries were included in the figure, because the other countries were with one frequency. Results showed that the United States is the first country with 65 publications related with learning environments and special education in Scopus. The United Kingdom, Norway, Brazil, Sweden, Greece, Canada, Ireland, Malaysia and Turkey were the other countries with the highest number of publications Table 2. Table 2 shows the document types of the published documents. Most of the published documents were articles (f = 125, 69.44%). Therefore, it can be determined that authors choose to publish research articles rather than other types of documents. It was also revealed that conference paper (f = 25, 13.89%), book (f = 11, 6.11%) and book chapter (f = 9, 5.00%) were also frequently mentioned document types. Uzunboylu, H., & Akçamete, G. (2020). A content and citation analysis of the studies on learning environments and special education, International Journal of Cognitive Research in Science, Engineering and Education (IJCRSEE),8(2), 95-104 www.ijcrsee.com 100 Subject areas with one frequency value were not included in the figure. Results revealed that social sciences, psychology, medicine, computer science, health professions and mathematics were the most frequently studied subject areas in studies related with learning environment and special education. Figure 5.

Distribution of the published documents based on the keywords
Distribution of the published documents based on the keywords is shown in Figure 5. The top 10 frequently used keywords are involved in the figure. Results indicated that 'special education', 'human', 'article', 'learning environment', 'education', 'teaching' and 'computer-aided instruction' were the most frequently mentioned keywords in the papers about learning environment and special education. Uzunboylu, H., & Akçamete, G. (2020). A content and citation analysis of the studies on learning environments and special education, International Journal of Cognitive Research in Science, Engineering and Education (IJCRSEE),8(2), 95-104 www.ijcrsee.com 101 Table 3. Table 3 shows the distribution of languages of the papers about learning environment and special education. According to the results, majority of the published documents were in English (f = 175, 97.22%). There were four documents in Portuguese (2.22%), two documents in Turkish (1.11%), one document in Chinese and Spanish (0.56%). Table 4. Table 4 demonstrates the most cited documents on learning environments and special education. The 10 most frequently cited documents are included. The article with the highest citations was published in 2008 and it has 101 citations. This result is followed by an article with 93 citations in 2013; an article with 75 citations in 1996 and an article with 66 citations in 2009. When the subjects of the most cited articles are examined, it is seen that they mostly focus on inclusion, learning and social integration of the individuals with special needs.

Discussions
Evaluation in special education is very important in terms of determining the suitability of the student for special education, identifying the distinguishing characteristics of the student and determining and presenting the existing performance level of the student. Therefore, a systematic review of the scientific research conducted in this area is of great importance and the present study aimed to review the studies on learning environments and special education and reveal the trends in these studies through content analysis and citation analysis. According to the results, the number of published papers showed a regular increase especially after 2005 when compared to previous years and the highest number of publication is in 2017 with 23 publications. This might be related with the increase legal foundations, regulations and supervisions of special education practices since these make it obligatory to provide appropriate learning environments for the students with special needs, and therefore, the number of publications increased (Fulcher, 2015;Kauffman and Badar, 2014).
Furthermore, the highest number of publications were in European Journal of Special Needs Education, Lecture Notes in Computer Science, International Journal of Inclusive Education and Remedial and Special Education with five publications. Results indicated that the United States was the first country with 65 publications related with learning environments and special education in Scopus. In line with this result, Demirok, Baglama and Besgul (2015) found that the United States has the highest number of publication regarding special education. In addition, the United Kingdom, Norway, Brazil and Sweden were the other countries with the highest number of publications. According to the results, articles, conference papers and books were highly preferred by the researchers for publishing. Results revealed that social sciences, psychology, medicine, computer science, health professions and mathematics were the most frequently studied subject areas in studies related with learning environment and special education. Results indicated that 'special education', 'human', 'article', 'learning environment', 'education', 'teaching' and 'computer-aided instruction' were the most frequently used keywords in the published documents related with learning environment and special education in Scopus. These results might be related with the interdisciplinary nature of the field of special education (Hernandez, 2013).
Resulst regarding the languages of the published documents showed that majority of the published documents were written in English. Lastly, the article with the highest citations was published in 2008 with 101 citations. This result is followed by an article with 93 citations in 2013; an article with 75 citations in 1996 and an article with 66 citations in 2009. When the subjects of the most cited articles are examined, it is seen that they mostly focus on inclusion, learning and social integration of individuals with special needs, which is very important and prevalently studied research subjects in special education (Allen and Cowdery, 2014;Baglama and Demirok, 2016;Kirby, 2017;Uzunboylu, Uluc and Ozcan, 2017).

Conclusions and recommendations
In conclusion, the present study provided a comprehensive review for the studies related with learning environments and special education to provide a framework for the current situation and trends in these studies. Recommendations are provided for further research and practices: • Different academic databases should be analysed in order to reveal the trends in published papers on learning environments and special education.
• Guidelines for how to constitute appropriate learning environments for individuals with special needs might be emphasised more in scientific research for researchers and professionals of special education.
• Other content analysis criteria including research sample, topic, method and number of authors might be used to point out these tendencies in the published documents related with learning environment and special education.
• Instead of revealing the current situation, further research might carry out studies with different research methods in order to provide comparative results.