Yes, the jhu cty talent search testing is the SCAT for 2nd-6th grades. The EXPLORE is used by Rocky Mt talent search and Duke TIP talent search. But in order to be in the talent search at all, you first have to provide test results that are 95% or above (usually state test scores) or parent justification for homeschool kids or special cases. So, the results of the SCAT or EXPLORE (and later SAT/ACT) compare you to other kids that are already in the top percentiles. Does that make sense?