Development and validation of interpretation bias questionnaire with ambiguous scenarios

To develop a depressive interpretation bias questionnaire with Chinese culture based on the similarity rating task（SRT）, and to test its reliability and validity.

After being authorized, the ambiguous paragraphs in cognitive behavior modification errors prospective training items（CBM-I）were translated and screened in the first round, the screened paragraphs combined with the remaining of SRT and the self-written ambiguous paragraphs to form the screening questionnaire of the second round. Fourteen ambiguous paragraphs were selected as the items, and then the ambiguous situation interpretation bias questionnaire was compiled using SRT as the template. The reliability and validity analysis and item analysis were launched after 477 were tested by the questionnaire mentioned before.

A 14-item-formed questionnaire was compiled after 2 rounds of screening, then 5 factors were extracted by exploratory factor analysis, and the cumulative contribution rate was 52.67%. The confirmatory factor analysis showed that the five-factor model fitted well. Cronbach's α was 0.613, and split-half reliability was 0.617; Paired t-test was used to test the content validity, which showed significant difference between the target sentences and the foil sentences（t=-12.90, P<0.01）. The questionnaire had good criterion validity, regarding the center for epidemiologic studies depression scale（CES-D）in Chinese version as criterion, while the total T score was significantly correlated with the total score of the CES-D（r=-0.224, P<0.01）.

The interpretation bias questionnaire with ambiguous scenarios is a applicable measurement of depression interpretation bias in China.