"more rigorous research" is correct and usable in written English.
You can use it when you want to refer to research that is thorough and exacting. For example, "We need to conduct more rigorous research in order to get accurate results."
Research indicates that survivors often experience multiple mental health problems, and that there is a need for more rigorous research that targets symptoms beyond post-traumatic stress (PTS).
All of these interventions warrant further, more rigorous research.
But recent and more rigorous research suggests that this silver bullet missed its mark.
Further investigation with a more rigorous research design and a larger sample size is warranted.
A good deal of the more rigorous research into sexuality in sport suggests that the opposite is probably true.
The credibility of educational research will not improve until more rigorous research models become more predominant in the field.
Our goal in doing so is to pave the way for more rigorous research and discussion on this important question.
There is suggestive evidence that health education approaches may help reduce risk of congenital toxoplasmosis but this problem requires further study using more rigorous research design and methodology.
Overall, it appears that after-school programs may have positive impacts on participants, but more rigorous research designs are necessary to provide data that clearly document program effects.
The results suggest several developments in research focus and methodology; recent research has focused more strongly on services and applies more rigorous research designs.
In addition, more rigorous research designs and qualitative research should be conducted to support the effectiveness or social validity of the services and to inform evidence-based practice.
