A combination of probability and nonprobability sampling methods will be utilized. Because the population is extremely large and widely dispersed, a cluster sampling method will be used first. The Music Library Association's institutional membership list will provide the initial cluster of the sample. Quota sampling will then be performed, ensuring that location and type of library information, collected from the MLA list, and circulation, collection size, and presence of online public access catalog data, taken from an international directory of libraries, are proportionally represented in the sample. A list of representative libraries is available in Appendix B.
The population of music research library users is estimated to be between 30 and 40 thousand nationally. Therefore, the minimum sample size, using the table for determining sample size developed by Krejcie and Morgan, is 379. If 50 libraries participate in administering the survey, approximately 8 responses from each library will provide an adequate sample. This number should not prove difficult to achieve from even the most survey-weary library. In order to ensure an adequate response rate, however, oversampling will be performed.
The users questioned in this survey will be selected through accidental sample. That is, all users who happen to visit each location during the randomly selected time periods will be asked to complete the survey. The staff at each participating library is only required to distribute and collect the individual copies of the survey instrument.
The surveys will be completed on a randomly selected weekday during each of the months of April, August, and December and returned to the researcher using supplied, postage-paid envelopes. Since many music libraries are associated with academic institutions, this schedule will increase the response rate by allowing the survey to be conducted at times when the user population is largest.
2. Music Library Association, Membership Handbook. 1994 ed. (Canton, MA: Music Library Association, 1993).
3. American Library Directory 1994-1995. 47th ed. (New Providence, NJ: R. R. Bowker, 1993).
4. Powell, 75.