Abstract
A new interest test and a personality test were constructed under the following methodological viewpoints.
a). Group principal axis method of factor analysis (g. p. a.) was applied in item selection.
b). In item selection and weight calculation reliability coefficient (test-retest) of the item was taken into consideration.
c). An attempt was made to reduce the effect of response distortion on the score. Main results were as follows:
(1) In the interest test g. p. a. was not so effective, but in none of the 18 finally obtained scales the ratios of variance explained by principal factors were less than 70%, so that generally highly homogeneous scales were obtained.
(2) In the personality test g. p. a. was found effective, though in none of the 10 scales the variance ratios of the principal factors were more than 75%, so that it cannot be concluded that they were highly homogeneous. But compared to other completed personality tests, they were not disappointing. Six factors extracted in the factor analysis of scale including Y-G Test and T. I. Test were confirmed to show the expected feature.
(3) The component related to social desirability (s. d.) being eliminated from each scale, it was found that in the interest test the scales related to the masculine interest which requires high levels of knowledge and technical skill and in the personality test the scales signifying the harmonious personality such as Emotional Stability and Social Extroversion have the s. d. component to a relatively large extent.
(4) A scaling method of Lie and Acquiscence was proposed as validity scales in the personality test.
(5) A split-half reliability coefficient was calculated for each scale and satisfying results were obtained except for a few of the scales.
