The phrase "research is weak" is correct and usable in written English.
You can use it to express an opinion regarding something that was researched and found to be lacking in strength. For example: "Our research is weak, so we have decided to start from scratch."
Silica helps to strengthen collagen -- research is weaker on this but it helps strengthen your existing hair.
Dr Robin Carhart-Harrisaysys the evidence from historical research was weak.
Dissemination and promotion of research results is weak.
However, the relationship between the physical environment and behavior in persons with dementia is not yet fully understood, and the research evidence is weak regarding some environmental aspects.
Portugal's record in research and development is weak.
As Table 2 demonstrates, the quality of survey items that have been applied in IC research to date is weak.
Design research is increasingly weak in comparison with other fields; without action to increase scientific, theoretical, and methodological rigour there is a real possibility of the field being superseded and becoming obsolete through lack of impact.
The fundamental assumption of our research is that weak national identity makes it susceptible to political propaganda and turns identity into an instrument of foreign policy instead of being its key driver and determinant.
In other words, one might consider that prior to our study, all the animals of the HD area had been subjected to very frequent human disturbance (i.e. anthropogenic sounds and approaches by human observers) over the years, whereas the likelihood that they had previously been captured and manipulated for scientific research is extremely weak.
"Our research shows the association is weak".
