Read the paragraph given below and answer the questions given below:

A psychologist developed a cordiality and competence scale. As part of scale development, he conducted a factor analysis of 25 items to retain 20 items. He chose exploratory factor analysis (EFA). Bartlett test = 237.8 p < .001 overall, Kaiser-Meyer-Olkin test (KMO) is 0.89. He used principal component analysis (PCA) to obtain factors. The first eight eigenvalues ​​obtained were 9.9, 6.5, 1.6, 1.00, 0.85, 0.83, 0.82 and 0.79, respectively. He retained the blocks on the basis of the scree plot and rotated on the varimax criterion.

Three items showed unfavorable loadings and eighteen items loaded on only one factor, the remaining items did not load on any factor.