Number of Judges when Scaling Attitude Items

Sjödahl, L. 1974. Number of Judges when Scaling Attitude Items. Scand. J. educ. Res. 18, 183‐197. When constructing attitude scales for measuring patient‐centering among student nurses the author has carried out a series of studies of the method of attitude scale formation. The article presents one of several methodological studies published by the same author in Ped. psyk. problem (nr. 184). Scale values, interquartile range, interval position and the selection of items for the final scale are studied as dependent variables when varying the size of the judging group. The results show that correlations between series of scale values from judging groups of varying sizes can be very high but that we can still get quite a different selection of items for the final scale, depending upon which judging group we use in the scaling procedure. The stability of the interval placements of the statements is shown to vary with the intervals along the scale.