This is a summary report on the progress and conclusions made to date on tests of several factors. The factors are: aiming, deduction, finger dexterity (motor speed), flexibility of closure, fluency of expression, induction, ideational fluency, associative memory, mechanical experience (mechanical knowledge), number, perceptual speed, space, spatial orientation, speed of closure, verbal, visualization, visual memory, word fluency, personality factors, and achievement factors. The author considers progress on these tests "slow, but encouraging" and concludes that "we can consider the job complete, when, for each listed factor, we have either a set of reference tests or the statement that the factor is not yet well enough established to justify the selection of reference tests."