triangulation

The researchers used triangulation, combining interviews, observations, and document analysis to enhance credibility.研究人员使用了三角验证法，结合访谈、观察和文件分析来增强可信度。

Methodological triangulation involves applying multiple research methods to the same research question.方法论三角验证法涉及将多种研究方法应用于同一研究问题。