So what is it? If it's a 'household name' then I'm sure most here will be familiar?
haha lol. Why would most here be familiar with it, unless you do assessment or diagnostic testing?
Its the most popular used test to determine one's IQ and is the most used for psychological/educational testing purposes among psychologists, psychiatrists, school psychologists, etc. It has the greatest reliability and validity and is currently the number one IQ assessment measure.
Again, just because it is not know within the getbig circle, it doesn't mean it does not exist. As if, getbig is the end-all, be-all haha lol
You can do your own research to find out. Just google it.