The associations, the size of their U.S. resident, non-student membership (as of 1983), and the general topical interest(s) of their members as it relates to geoscience maps are listed below. Only those members who are U.S. residents and nonstudents were included in the population from which the sample was drawn. A sample representing 3 percent of the population was drawn by selecting the thirty-third name and multiples thereof from each of the membership lists. If the name selected on a given membership list had already been selected from a previous list, the next name on that list was selected.

American Association of Petroleum Geologists

24,133

All aspects of the geologic sciences related to the petroleum industry

Association of Engineering Geologists

2,233

Engineering geology

American Institute of Certified Planners

4,667

Applied geology (geoscience) as it relates to urban and regional planning

American Water Resources Association

1,933

Primarily applied groundwater

Geological Society of America

9,800

All aspects of the geologic sciences, especially basic research

Society of Exploration Geophysicists

10,500

Applied geophysics, largely related to the petroleum industry

Society of Economic Geologists

1,700

Geology related to mineral deposits and mineral exploration

Society of Economic Paleontologists and Mineralogists

3,967

Primarily basic problems in stratigraphy and paleontology

Society of Mining Engineers

19,000

Engineers and geologists engaged in work related to mining and the mineral industry

TOTAL

77,933

The decision on the sample size was based upon the desire for a response accuracy on the order of 3 percent in estimating proportions for the entire population at the 95 percent confidence level. Such a response accuracy would require a return of approximately 1100 forms. Assuming a response rate of 50 percent, about 2200 forms would have to be distributed. A total of 2388 questionnaires



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement