When interviewing: how many is enough?

Sample size: how many is enough?

Sample size is an element of research design that significantly affects the validity and clinical relevance of the findings identified in research studies. Factors that influence sample size include the effect size, or difference expected between groups or time points, the homogeneity of the study participants, the risk of error that investigators consider acceptable and the rate of participant...

When enough is enough.

The European Commission should be regulating nanosilver, not asking for yet another report on its impact on health and the environment.

When Is Enough, Enough?

As academic researchers we have to walk a delicate line when it comes to publishing papers on similar topics, possibly using the same data sets. On one hand, we want to get as many articles published as possible, preferably in high quality journals. We want to leverage the data sets that we have spent considerable effort collecting. On the other hand, we need to be careful not to overuse these ...

How many doctors are enough?

How Many Earths Are Enough?

The goals of NASA’s Terrestrial Planet Finder (TPF) and ESA’s Darwin missions are to find and characterize terrestrial planets in the habitable zones of other stars, and to search for evidence of life in the atmospheres of any planets found. A key issue that must be addressed is the size of the sample of stars that must be searched before the scientific community, the funding agencies, and the ...