Course Help

#1
For a course, I need to superficially understand an applied statistical approach from a research paper. The following link; is the paper in question. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7175441/pdf/JMedLife-13-87.pdf

From my understanding, this paper is aiming to statistically investigate if there is a significant change in nurse anxiety for the three intervention groups compared to the control. The three intervention groups are; aromatherapy, music therapy, and a combination of both. Within the study, the researchers used the following statistical tests; chi-square test, one-way ANOVA, and a bonferronic post-hoc test. Based on this information, I believe this research is using an associational statistical approach.

Please give me feedback, do you think my understanding of the procedure and approach are correct?

Thank you!
-Hope