TY - GEN AU - Roehrig,W C TI - An instrument for one- or two-dimensional tracking SN - 0031-5125 PY - 1965///1120 KW - Humans KW - Motion Perception KW - Psychology, Experimental KW - instrumentation N1 - Publication Type: Journal Article UR - https://doi.org/10.2466/pms.1965.21.1.307 ER -