### Abstract

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.

Original language | English (US) |
---|---|

Pages (from-to) | 911-919 |

Number of pages | 9 |

Journal | Perceptual and Motor Skills |

Volume | 37 |

Issue number | 3 |

State | Published - 1973 |

### Fingerprint

### ASJC Scopus subject areas

- Psychology(all)
- Experimental and Cognitive Psychology

### Cite this

*Perceptual and Motor Skills*,

*37*(3), 911-919.

**Ratio scaling of TAT need for achievement through application of a paired comparisons method, with a test of internal consistency.** / Goff, D. P.; Uleman, James.

Research output: Contribution to journal › Article

*Perceptual and Motor Skills*, vol. 37, no. 3, pp. 911-919.

}

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, James

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

M3 - Article

VL - 37

SP - 911

EP - 919

JO - Perceptual and Motor Skills

JF - Perceptual and Motor Skills

SN - 0031-5125

IS - 3

ER -