Dr. Jones is developing a research study in which he plans to use the length of a participant's ring finger to determine mathematical prowess. At the most basic level, his indicator fails which test for validity?

This is what i found on google “eightin 1997, the mccaughey septuplets were born in carlisle, iowa. multiple births of as many as eight babies have been born alive, the first set on record to the chukwu family in texas in 1998; one died and seven survived. in 2009, a second set, the suleman octuplets, were born in bellflower, california.” i was surprised about this . i don’t want to have that many babies .

Apart of the parietal lobe