@Victor_Emmanuel @Gundog @sickburnbro Oh, sorry.

That was Quin Fisher Curtis, under John. F Shepard, Michigan University, 1920s and 1930s.
You can read this - "The Analysis of Maze Learning" (published in Principles of Psychology) by another guy
https://gwern.net/doc/psychology/animal/maze/1935-maier-principlesofanimalpsychology-ch17-theanalysisofmazelearning.pdf

Richard Feynman retells this in a book of his and the results are basically that rats can use clues like the sound of the floorboards to find their position in the maze. Researchers eliminated this by covering the floor with sand, but this hasn't been widely adopted in maze design since then.