Category Archives: Tests and measures

Measurement: I do not think it means what you think it means

From a comment by Eric Loken at:

Every column of data has a label and numbers. Due to measurement issues, the numbers may have unobserved perturbations, and the label may or may not accurately stand for what the numbers actually represent. And from one model to the next, depending on the other covariates, the numbers actually represent can change. But the label sits on top of the column, and it sits in every summary table, and it all looks so clear cut that it is easy to take for granted that it is what says it is.


Instruments from

All sorts of spatial tests here, including the following areas. Some tests are specifically geared for children.

  • Force and motion
  • Mental bending
  • Mental (de)fragmentation
  • Mental folding
  • Mental slicing & penetrative thinking
  • Mental rotation
  • Navigation
  • Perspective taking
  • Scaling
  • Spatial assembly
  • 2D to 3D translation
  • Understanding topographic maps