Norcross J C, Prochaska J O, Guadagnoli E, DiClemente C C
J Clin Psychol. 1984 Mar;40(2):519-28. doi: 10.1002/1097-4679(198403)40:2<519::aid-jclp2270400223>3.0.co;2-j.
Investigated the factor structure of the Levels of Attribution and Change (LAC) Scale, a 60-item, Likert-format instrument designed to assess the levels and loci of causal attributions about a problem behavior. Principal component analyses were performed on two samples, 194 adult smokers and 140 professional psychotherapists. In both cases, nine distinct and interpretable components were retained, which accounted for 63% and 68% of the total variance, respectively. Coefficients of congruence indicated that the two component patterns were quite similar. Item cross-classification revealed that the nine components closely resemble the 10 theoretical scales, with 2 scales (Familial Conflicts, Interpersonal Conflicts) represented by one component. Estimates of internal consistency averaged .84 and .87 for the two samples. The LAC theoretical scales and the scoring system have considerable empirical justification. The LAC Scale appears to be an internally consistent, multidimensional inventory with a robust factor structure.
研究了归因与改变水平（LAC）量表的因子结构。该量表为60题的李克特式量表，旨在评估对问题行为的因果归因水平和归因点。对两个样本进行了主成分分析，样本一是194名成年吸烟者，样本二是140名专业心理治疗师。在这两种情况下，均保留了九个不同且可解释的成分，它们分别占总方差的63%和68%。一致性系数表明两种成分模式非常相似。项目交叉分类显示，九个成分与十个理论量表非常相似，其中两个量表（家庭冲突、人际冲突）由一个成分代表。两个样本的内部一致性估计平均值分别为0.84和0.87。LAC理论量表和评分系统有相当多的实证依据。LAC量表似乎是一个内部一致的多维量表，具有稳健的因子结构。
