If you're lucky, the full text will be available for free online. At least you'll see a citation to a specific article or book that provides the instrument.
If you're somewhat lucky, you'll discover that a company is selling it (hey, at least you'd know)
Or you could find that there are different authors, different versions, and no way to tell whether a journal article or book is providing the instrument - in that case, use the "finding research instruments" searches to the right
You are responsible for contacting the author or publisher of the research instrument to ensure that you have permission to use the research instrument (and to reproduce it if you plan to share a copy with others).
Descriptions and reviews of standardized educational, personality, aptitude, intelligence, and achievement tests. Includes "publisher information" (sources for purchasing tests), not the full text of tests.
Guide to nursing and allied health literature. Type a very simple version of your topic, one word. Under Search Options, limit the Publication Type to Research Instrument. Search.
You might need to follow a "check for full text" link to see your result. The result should describe a research instrument. And either provide the full version or give a reference to another source that might or might not contain the full version.
At this point, you can search for the reference given or try searching Google for the name of the instrument.
If you identify an instrument that you would like to use but can't find the full text freely online or in articles or books, there is a strong chance that the authors aren't making it widely available. Contact them to ask for it.
Guide to psyc literature. Some results include description of whether the item has full text of a test or measure. Type your search topic in the top box. Then in the next search box, type appended and set the search field to TM Tests and Measures.
Guide to education literature. Some results include description of whether the item has full text of a test or measure. Type your topic (a broad search such as communication or language will get many more results than a narrow search such as aphasia). Then, under the Refine Search tab, set Publication type to Tests. If you get plenty of results from this search, you may want to filter results even more. It is possible to set Education Level to Early Childhood Education, Preschool, etc. For each
Free online data collection tool and question bank for researchers. Download surveys and scoring instructions or use this site to administer your survey online. Includes surveys across many health domains. Content from: Patient-Reported Outcomes Measurement Information System (PROMIS), Quality of Life in Neurological Diseases (Neuro-QoL), NIH Toolbox, Health LiTT. Free registration required.