Comparing a pair of paired comparison experiments: Examining the validity of web-based psychophysics

Abstract

Paired comparison experiments are frequently used to gather observer preference data in many areas of image enhancement. However, due to the large quantity of comparisons each individual must complete, these experiments are typically carried out with few observers. Taking this method onto the web is a quick way of gaining a larger number of observers and preference judgements. This work examines the validity of web based paired comparisons and whether the loss of control over viewing conditions causes significantly different results.