KerleR. H., & BialekH. M.Construction, validation, and application of a subjective stress scale.Presidio of Monterey, Calif.: U. S. Army Leadership Human Research Unit, February, 1958. (Res. Memo., HumRRO)
2.
MoldawskyS., & MoldawskyP. C.Digit span as an anxiety indicator. J. consult. Psychol., 1952, 16, 115–118.
3.
MyersT.BurdayG.ForbesL., & ArbitJ.The reliability of a modified digit-span test procedure. Paper read at Western Psychological Association convention, Monterey, California, April, 1958.
4.
WechslerD.The measurement and appraisal of adult intelligence.Baltimore: Williams & Wilkins, 1958.