What a difference a parameter makes: a psychophysical comparison of random dot motion algorithms.

ABSTRACT: Random dot motion (RDM) displays have emerged as one of the standard stimulus types employed in psychophysical and physiological studies of motion processing. RDMs are convenient because it is straightforward to manipulate the relative motion energy for a given motion direction in addition to stimulus parameters such as the speed, contrast, duration, density, aperture, etc. However, as widely as RDMs are employed so do they vary in their details of implementation. As a result, it is often difficult to make direct comparisons across studies employing different RDM algorithms and parameters. Here, we systematically measure the ability of human subjects to estimate motion direction for four commonly used RDM algorithms under a range of parameters in order to understand how these different alg

SUBMITTER: Pilly PK 

PROVIDER: S-EPMC2789308 | biostudies-literature | 2009 Jun

REPOSITORIES: biostudies-literature