user14758: I'm interested in the effects of aspect ratio on perception in video, whether it's movies or else, looking for detailed research. Could anyone recommend books, courses, research papers on the subject?
I've looked on google scholar but aspect ratio is a broad subject that has different meanings in different fields, thus I couldn't find anything relevant.

user1871: The most relevant keyword to add to your search is psychophysics, which is "the analysis of perceptual processes by studying the effect on a subject's experience...".
More directly, there's this SMPTE paper Searching for the Perfect Aspect Ratio. 
The paper visits some of the research conducted on different aspect ratios and its take-away is

The research for this paper found no clear indication of a preference
  for any particular aspect ratio for moving images nor any
  physiological reason to favor one over another.


14758: <p>I'm interested in the effects of aspect ratio on perception in video, whether it's movies or else, looking for detailed research. Could anyone recommend books, courses, research papers on the subject?</p>

<p>I've looked on google scholar but aspect ratio is a broad subject that has different meanings in different fields, thus I couldn't find anything relevant.</p>
 1871: <p>The most relevant keyword to add to your search is <a href="https://en.wikipedia.org/wiki/Psychophysics" rel="nofollow">psychophysics</a>, which is "<em>the analysis of perceptual processes by studying the effect on a subject's experience...</em>".</p>

<p>More directly, there's this SMPTE paper <a href="http://dx.doi.org/10.5594/J09548" rel="nofollow">Searching for the Perfect Aspect Ratio</a>. 
The paper visits some of the research conducted on different aspect ratios and its take-away is</p>

<blockquote>
  <p>The research for this paper found no clear indication of a preference
  for any particular aspect ratio for moving images nor any
  physiological reason to favor one over another.</p>
</blockquote>
