https://pubmed.ncbi.nlm.nih.gov/12705505/
Do people still report dreaming in black and white? An attempt to replicate a questionnaire from 1942In the 1940s and 1950s many people in the United States appear to have thought they dreamed in black and white. For example, Middleton (1942) found that 70.7% of 277 college sophomores reported “rarely” or “never” seeing colors in their dreams. The present study replicated Middleton’s questionnaire and found that a sample of 124 students in 2001 reported a significantly greater rate of colored dreaming than the earlier sample, with only 17.7% saying that they “rarely” or “never” see colors in their dreams. Assuming that dreams themselves have not changed over this time period, it appears that one or the other (or both) groups of respondents must be profoundly mistaken about a basic feature of their dream experiences.
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The first time I heard about the phenomenon of people dreaming in monochrome was in a Hammer horror episode called Rude Awakening, starring the delightful Denholm Elliott. (He expresses surprise that all the dreams were in colour).
The date of the earlier study suggests to me that it was most likely to be due to films rather than TV, as only a few % of Americans had television in 1942.
