We have done some of the work for you in finding business test instruments, by finding those most likely to have some. To get a brief description of each, click the plus sign (+) beside it. That will include any special instructions for searching it for test instruments.
Test Instruments in Books
If you're trying to find a business-related testing instrument, a good starting point is to try "questionnaire" with "business" as keywords or in the Title field in our Library's catalog. Search results can be narrowed with facets such as topic, era, language or region. Facets are located on the right hand side of the results screen. WorldCat (OCLC)
If there's a book that Villanova does not have but which would be particularly useful for finding or creating a business test instrument, WorldCat, which is a catalog of library holdings worldwide, will indicate any local library holdings and also offers an inter-library loan request option.
Test Instruments in Databases
ABI/INFORM Complete (ProQuest)
This is a database of worldwide business periodicals. The best thing for finding test instruments is to search it for "questionnaire" in the Title field while limiting the results to those for which the full text is available. Dissertations and Theses @ Villanova University (ProQuest)
This database provides access to many of the dissertations and theses published by members of the Villanova community, some of which include test instruments. Dissertations and Theses Full Text (ProQuest)
This database offers over 2.4 million dissertations and theses from around the world, some of which have test instruments included. Most are available in full text. EconLibrary
This database contains over 300,000 bibliographic references from 500 leading journals of accounting, economics and finance. Some involve questionnaires, though you must find the text of the articles elsewhere. EconLit with Full Text (EBSCO)
This database offers citations and abstracts of journal articles, books, working papers and dissertations from 1969 to present, with the full text of all AEA journals and roughly 400 other scholarly journals. There are some results with questionnaire in the title which are about business-related matters. Emerald Journal Database
Full-text journal articles on management and economics. Go to Advanced Search and search for "questionnaire" in "Content item title." Inter-university Consortium for Political and Social Research (ICPSR)
The Inter-university Consortium for Political and Social Research collects data from surveys and various public records that scholars have used in past projects, and distributes them. Some touch on business-related matters such as product brand. ProQuest Business Periodicals (ProQuest)
Your best method is this: when you have found a promising result in ICPSR from your "questionnaire" search, click on Browse Documentation, and on that page, open or download the "Codebook" for the project, which should include the test instrument used.
Scroll down to Business and click on Search, then Advanced Search. Search for questionnaire in the Title. This alone results in over three thousand hits, so of course add any other term you're particularly looking for in another box, to narrow it down. Polling the Nations
The database includes 18,000 surveys and 600,000 questions on more than 7,000 topics. Scope is international, from the United States to more than 100 other countries. Roper Center for Public Opinion Research
If you're trying to create new questions you might find some ideas here for substance and phrasing. The Roper Center has nearly 500,000 questions and responses from national public opinion surveys going back to 1935. First-time users have to register.