TY - JOUR
T1 - Ratio scaling of TAT need for achievement through application of a paired comparisons method, with a test of internal consistency
AU - Goff, D. P.
AU - Uleman, J. S.
PY - 1973
Y1 - 1973
N2 - A method for ratio scaling of projective personality variables was devised and tested in two studies, using the TAT and achievement motivation (n Ach). In Exp. I, 4 judges made direct ratio estimates of relative n Ach in all possible pairs of 8 subjects' TAT protocols (28 pairs). In Exp. II, 3 judges used the same procedure to estimate relative n Ach for all pairs of TAT stories told to the same card, rather than for four story protocols (112 pairs). Ratio scale values correlated with traditional n Ach scoring between .86 and .91 in Exp. I, and .90 and .95 in II. The protocols represented two criterion groups with different n Ach. Ratio scores from Exp. II, but not from I, differentiated these groups as well as traditional scoring. A model was developed for testing the internal consistency of judges' ratio estimates, based on Comrey's work. It showed over 90% of the ratio estimates' variance accounted for by the linearity assumptions of the ratio scaling model. Advantages and problems in using the ratio scaling method were discussed.
AB - A method for ratio scaling of projective personality variables was devised and tested in two studies, using the TAT and achievement motivation (n Ach). In Exp. I, 4 judges made direct ratio estimates of relative n Ach in all possible pairs of 8 subjects' TAT protocols (28 pairs). In Exp. II, 3 judges used the same procedure to estimate relative n Ach for all pairs of TAT stories told to the same card, rather than for four story protocols (112 pairs). Ratio scale values correlated with traditional n Ach scoring between .86 and .91 in Exp. I, and .90 and .95 in II. The protocols represented two criterion groups with different n Ach. Ratio scores from Exp. II, but not from I, differentiated these groups as well as traditional scoring. A model was developed for testing the internal consistency of judges' ratio estimates, based on Comrey's work. It showed over 90% of the ratio estimates' variance accounted for by the linearity assumptions of the ratio scaling model. Advantages and problems in using the ratio scaling method were discussed.
UR - http://www.scopus.com/inward/record.url?scp=0015718054&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0015718054&partnerID=8YFLogxK
U2 - 10.2466/pms.1973.37.3.911
DO - 10.2466/pms.1973.37.3.911
M3 - Article
C2 - 4764525
AN - SCOPUS:0015718054
SN - 0031-5125
VL - 37
SP - 911
EP - 919
JO - Perceptual and motor skills
JF - Perceptual and motor skills
IS - 3
ER -