You can use Google Scholar to find test instruments or information about test instruments. Here are a few things to remember:
1) Enter the name of the test instrument into a Google Scholar search box. You will probably want to use quotes around the instrument title so that Google Scholar will search for the title as a phrase.
2) Look for a title that sounds like the article discusses the development of the instrument. Or you may see a result with the exact title of the instrument, as in this example.
3) In this example, all documents needed to use the Mayo-Portland Adaptability Inventory are provided as free downloads. Instructions for how to use the instrument are provided above the download links and on the rest of this site.