A study of trait variability /
Foran, Thomas George,1900-
Lillis, Gerald Albert.
O'Leary, Charles Edward.
Catholic University of America.
Washington, D.C. : Catholic Education Press,
c1928.
The studies reported were conducted by G. A. Lillis and C. E. O'Leary. T. G. Foran, who directed the investigations, has combined them in the present report. cf. p. 3.
"Tests employed in present study": p. 17.
Intelligence tests.
Ability testing.