"People doing the kind of sound research that I'm interested in still have a difficult time"

This quote by Joseph Jarman speaks to the difficulty of conducting sound research study in the field. Jarman is most likely referring to the challenges of performing research study in a field that is continuously altering and progressing. He is likely referring to the problem of keeping up to date with the most recent research study and findings, as well as the difficulty of finding reliable sources of info. Additionally, Jarman might be describing the problem of finding funding for research jobs, as well as the trouble of finding the time and resources to conduct the research study. Eventually, Jarman is stressing the trouble of carrying out sound research in the field, and the significance of staying up to date with the current research study and findings.