In the framework of the pandemic caused by CoVId-19, education worldwide, as a preventive measure, went from face-to-face to virtual. The untimely manner of this change, and without prior preparation, brought difficulties and also some advantages to doctoral students. This forced some authors to create a documentary measurement instrument called "doctoral students’ virtual learning perception in the CoVId-19 framework" with four dimensions and 30 items on a Likert-type scale. The objective of this work is to present from the quantitative approach the internal and external validity of the mentioned instrument. The results show a Cronbach's alpha coefficient, initial and final, greater than 0.8 and a Pearson correlation coefficient different from zero. It is concluded that the analyzed instrument is not only sufficient and relevant, but also has validity because it is reliable and stable.