McPherson F M, Antram M C, Bagshaw V E, Carmichael S K
Br J Psychiatry. 1977 Jul;131:56-8. doi: 10.1192/bjp.131.1.56.
To test the Foulds and Bedford hierarchical model of personal illness, the Delusions-Symptoms-States Inventory (DSSI) was administered to 100 psychiatric in-patients. Ninety-six had symptom patterns compatible with the hierarchy. This is significantly more than expected on the basis merely of the number of DSSI items affirmed, and overall the results support the model.
为了检验福尔兹和贝德福德的个人疾病层次模型，对100名精神科住院患者进行了妄想-症状-状态量表（DSSI）测试。96人的症状模式与该层次模型相符。这显著多于仅基于肯定的DSSI项目数量所预期的，总体而言，结果支持该模型。
