See e.g: Torgny T. Segerstedt: "Gruppen som kommunikationssystem", Uppsala 1955; "Slutna och öppna arbetsgrupper", Uppsala1956; "Symbolmiljö, mening och attityd", Uppsala1956; Torgny T. Segerstedt and Agne Lundquist: "Människan i industrisambället", Part I Stockholm1952, Part II Stockholm1955 (with summary in English).
2.
2) J.H. Voor: "Subliminal Perception and Subception", J. Psychol. , 41/1956, p. 437-458.
3.
3) B.B. Chatterjee and C.W. Eriksen: "Conditioning and Generalization of GSR as a Function of Awareness ", J. Abn. & Soc. Psychol., 60/1960, p. 396-403.
4.
R.S. Woodworth & H. Schlosberg : "Experimental Psychology", London1955.
5.
5) Joseph B. Cooper and David N. Singer : "The Role of Emotion in Prejudice", J. Soc. Psychol., 44/1956 , p. 241-247.
6.
J. Toby and M.L. Toby: "A Method of Selecting Dichotomous Items by Cross Tabulation" in Riley et al.: "Sociological Studies in Scale Analysis", New Brunswick1954 .
7.
R.N. Ford: "A Rapid Scoring Procedure for Scaling Attitude Questions" in Riley et al.: "Sociological Studies in Scale Analysis", New Brunswick1954.
8.
B.F. Green : "A Method of Scalogram Analysis using Summary Statistics", Psychom. 22/ 1956, p. 79-88.
9.
L.A. Goodman : "Simple Statistical Methods for Scalogram Analysis ", Psychom. 24/ 1959, p. 29-43.
