"This study represented an attempt to determine whether college achievement could be foretold on the basis of the Pressey X-O Tests, and if so, to what extent; and whether such character trait tests when used in conjunction with an intelligence test would materially raise the correlation existing between such test scores and scholastic achievement. The very unusual materials and methods of the X-O tests were found capable of yielding results of appreciable significance with regard to certain practical problems. There seems to be excellent ground for continuation of work along this line, with the expectation that instruments of much greater adequacy for the measurement of extra-intellectual traits may be developed." (PsycINFO Database Record (c) 2006 APA, all rights reserved)