Thomas International


What is GIA?

GIA is an aptitude and ability assessment that measures a person's mental horsepower.

Thomas GIA takes 30 minutes to complete and you are provided with a report that shows how accurately and quickly the person is able to handle:
  • Reasoning
  • Perceptual speed
  • Numbers
  • Word meaning
  • Spatial visualization


General Intelligence Assessment (GIA/TST). TST was developed by Prof. Sidney Irvine and colleagues and its online counterpart, GIA, was developed by Dr Peter Dann in the Human Assessment Labratory at the University of Plymouth.