I'm surprised at the amount of comments here that reflect this data as if it's gospel and whether it's fair to interpret anything from it at all. We can't even vet and recreate the methodology of, as you said "limited movies", and see if it's correct for what it does say.
Not to mention the fact that prior to 1929 there is not more than 9 posters of data being analyzed.
Printing has changed also. Number of color, type of press, computerization all would contribute to difference in what designers would do (the analysis did mention this) but as mentioned the data was limited.
I'm surprised at the amount of comments here that reflect this data as if it's gospel and whether it's fair to interpret anything from it at all. We can't even vet and recreate the methodology of, as you said "limited movies", and see if it's correct for what it does say.
Not to mention the fact that prior to 1929 there is not more than 9 posters of data being analyzed.
Printing has changed also. Number of color, type of press, computerization all would contribute to difference in what designers would do (the analysis did mention this) but as mentioned the data was limited.