1992
DOI: 10.1016/0006-3223(92)90270-a
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Imaginary versus real light for winter depression

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Cited by 20 publications
(8 citation statements)
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“…In light research, various placebo-like conditions have been used, such as imaginary light,37 invisible light,38 extraocular light,28 low-intensity light,39 or another placebo condition totally unrelated to light, such as a deactivated ion generator 40. Responses to these “placebo” conditions have been found to vary from 36% to 46%.…”
Section: Working Mechanism and Etiologymentioning
confidence: 99%
“…In light research, various placebo-like conditions have been used, such as imaginary light,37 invisible light,38 extraocular light,28 low-intensity light,39 or another placebo condition totally unrelated to light, such as a deactivated ion generator 40. Responses to these “placebo” conditions have been found to vary from 36% to 46%.…”
Section: Working Mechanism and Etiologymentioning
confidence: 99%
“…Yet, the groups in that study only differed with respect to the numbers of patients who reached a remittance criterion, but not with respect to the final treatment outcome after 4 weeks. Richter et al (1992) found that the effects of real morning light were not different from those of imaginary morning light immediately after the treatment. However, 10 days after treatment, real light turned out to be superior.…”
Section: Other Mechanismsmentioning
confidence: 81%
“…So far, no methodologically justified placebo condition is available for light treatment. In light research, various placebo-like conditions have been used, such as imaginary light [ 50 ]; invisible light [ 37 ], extra-ocular light [ 51 ], low-intensity light [ 29 ], or a placebo condition totally unrelated to light, such as a deactivated ion generator [ 32 ]. Responses to these ‘placebo’ conditions have varied from 36 to 46 %.…”
Section: Discussionmentioning
confidence: 99%