Rund B R
Dikemark Psychiatric Hospital, Oslo, Norway.
J Abnorm Psychol. 1993 Feb;102(1):74-81. doi: 10.1037//0021-843x.102.1.74.
There is ample evidence that schizophrenics exhibit a backward masking deficit. To what extent other psychotic patients are susceptible to visual masking is still an open question. Likewise, differences between subgroups of schizophrenics have to be further explored. In the present study a computerized backward masking task was applied to 30 schizophrenics, 18 affectives and 20 normals. Results confirmed previous findings of a performance deficit in the schizophrenics. However, affectively disturbed patients performed even poorer than the schizophrenics. The most outstanding finding when the group of schizophrenics was split into different subgroups was the significant differences that appeared between chronic and nonchronic patients. The latter group (n = 8) performed as well as the normals, while the chronic schizophrenics (n = 22) showed evidence of a performance deficit comparable to the affectives.
有充分证据表明精神分裂症患者存在逆向掩蔽缺陷。其他精神病患者对视觉掩蔽的易感性程度仍是一个悬而未决的问题。同样，精神分裂症患者亚组之间的差异也有待进一步探索。在本研究中，对30名精神分裂症患者、18名情感障碍患者和20名正常人进行了计算机化逆向掩蔽任务。结果证实了之前关于精神分裂症患者表现缺陷的研究结果。然而，情感障碍患者的表现甚至比精神分裂症患者更差。当将精神分裂症患者组分为不同亚组时，最显著的发现是慢性和非慢性患者之间出现了显著差异。后一组（n = 8）的表现与正常人一样，而慢性精神分裂症患者（n = 22）表现出与情感障碍患者相当的表现缺陷。
