This journal on June 18, 2008

http://www.log24.com/log/pix11B/110724-Hustvedt-WechslerCubes.jpg

The Wechsler Cubes story continues with a paper from December 2009…

"Learning effects were assessed for the block design (BD) task,
on the basis of variation in 2 stimulus parameters:
perceptual cohesiveness (PC) and set size uncertainty (U)." —

(Click image for some background.)

The real intelligence test is, of course, the one Wechsler flunked—
investigating the properties of designs made with sixteen
of his cubes instead of nine.