This research was conducted as a qualitative study, in which the grounded theory (GT) approach was used to examine the phenomenon of interest. Grounded theory is the most commonly conducted research method within qualitative methodologies (
19). It is an inductive, systematic, qualitative research method concerned with the generation of theory, which is "grounded" in actual data, reflecting a modernist ontology (nature of reality). In GT research, data are systematically, iteratively, and rigorously collected and then analyzed to build theory (
20). The participants in this research were faculty members of medical universities in region 4. This region includes the medical universities of Ahvaz, Lorestan, Dezful, and the medical schools located in the region. No specific limitations were placed on participant demographics such as age, gender, or academic discipline. Faculty members from various disciplines, including medicine, nursing, dentistry, and allied health sciences, were represented, reflecting the diversity of academic expertise within the region. Inclusion criteria were faculty members of region 4 of medical universities, interested in participating in the study, and having more than one semester of teaching experience using virtual education. Exclusion criteria were transfer to another region and research faculty members who do not have teaching experience in the virtual education system. Sampling was conducted purposefully, and the sample size continued until theoretical saturation was reached. The interviews began with general and simple questions and progressed towards more specialized and detailed questions. The data collection tool was a semi-structured interview. Data collection continued from November 2023 to March 2024. All interviews were transcribed, and some were also recorded. Participants were asked for permission to record the interviews, and the research objectives were explained to them at the outset, with written consent obtained. A three-stage coding method was used to analyze the data of the study. Coding is a process in which the researcher engages in separating, conceptualizing, merging, and integrating data. In this process, the fundamental unit is the "concept". Stages of grounded coding include open coding, axial coding, and selective coding. Open coding involves the process of breaking down, comparing, conceptualizing, and categorizing data. The method of open coding not only leads to the discovery of categories but also clarifies their characteristics and dimensions (
21). Stages of open coding are analysis and coding, discovering categories, describing classes based on their characteristics and open coding table.
Motivational model for applying blended learning by faculty members was designed after coding. To ensure the validity and reliability of the extracted model, the qualitative method and Lincoln and Guba evaluation criteria were used. Based on this method, four criteria, credibility, transferability, dependability, and confirmability were considered for evaluation. To achieve each of these criteria, the following method was used:
(1) Credibility was established by meticulously recording all interview details and taking comprehensive notes throughout each step of the process. To ensure consistency, calculations between coders were performed, and for verifiability, reviews and peer feedback were utilized (
22).
(2) Confirmability was achieved by thoroughly documenting and maintaining all steps and records throughout the research process. This study provided a complete description of the research stages, including data collection, analysis, and theme formation, to allow the audience to evaluate the research. Additionally, the research process was reviewed by several expert members to ensure methodological rigor, incorporating their suggestions and guidelines into the work stages.
(3) Transferability was ensured by obtaining the opinions and approval of four experts who were not involved in the research, thereby validating the research findings. The findings were shared with these experts to assess their applicability in different contexts.
(4) Dependability in the research was ensured through several measures: Sufficient time was allocated for the research, interview data were verified by the interviewees post-implementation, and the research process was reviewed by multiple specialists. To prevent bias in the coding process, two additional coders were employed to code several interview samples, ensuring consistency in perspective and avoiding the influence of personal bias. Notes were taken during interviews to further support dependability. The method of member checking was utilized, where analyzed texts were provided to several participants for confirmation. Dependability was quantified using the Holstein criterion method, with the formula, where PAO represents the percentage of observed agreement (reliability coefficient), M is the number of agreements in two stages of coding, N1 is the number of units coded in the first stage, and N2 is the number of units coded in the second stage.