Interpolation of forms in random-dot stereograms with varying dot densities.

The types of forms which influence the effectiveness of stereopsis were investigated using random-dot stereograms with varying dot densities. 4 university students participated in the experiment in which 50 trials were presented randomly using five forms of the two densities. The reaction times from the RDS presentation to pushing the key when the form was identified were analysed. The interpolation of the corners of forms became difficult because density was reduced.