Glossary

A legislatively-mandated provision limiting the direct salary for individuals working on NIH grants, cooperative agreement awards, and extramural research and development contracts.

For research grant applications, and most other types of applications, reviewers judge the overall impact to reflect their assessment of the likelihood for the project to exert a sustained, powerful influence on the research field(s) involved, taking into account five criteria, among other pertinent factors: Significance, Investigator(s), Innovation, Approach, and Environment. These scored review criteria may not be applicable for some types of applications. When these criteria are not applicable, the FOA will include the specific review criteria. Reviewers will consider each of the five criteria in the determination of scientific and technical merit, and give a separate score for each. An application does not need to be strong in all categories to be judged likely to have a major scientific impact. See Peer Review Process/Scoring for additional information.

For purposes of NIH policy, a "significant difference" is a difference that is of clinical or public health importance, based on substantial scientific data. This definition differs from the commonly used "statistically significant difference," which refers to the event that, for a given set of data, the statistical test for a difference between the effects in two groups achieves statistical significance. Statistical significance depends upon the amount of information in the data set. With a very large amount of information, one could find a statistically significant, but clinically small difference that is of very little clinical importance. Conversely, with less information one could find a large difference of potential importance that is not statistically significant.