Important News & Updates

  • Many PRC/Hebb Lab Staff members are new and training is ongoing - please be kind! Allow plenty of advance time for your requests! Some requests may require more time to address. Your patience and understanding  are appreciated.
  • For a list of current awards to students please click here.

Otis Quick-Scoring Mental Ability Tests


1937, 1939, 1954


The Otis Quick-Scoring Mental Ability Tests are designed to "measure mental ability - thinking power or the degree of maturity of the mind."

Age Range: 

Both Children and Adults


  • 1 Manual of Directions for Gamma Test
  • 1 Manual of Directions for Beta Test
  • 1 Form for Gamma Test: Form Bm
  • 1 Form for Beta Test: Form A
  • 1 Scoring Key for Gamma Test: Forms Am, Bm, Em and Fm
  • 1 "Tables for Deriving IQ's on" sheet
  • 1 Class Record sheet for Beta and Gamma Tests


Harcourt, Brace and World.

Qualification Level: 

Level C or 1

Test Category: 

Intelligence and Scholastic Aptitude