Related Experiment Video
Updated: Jun 25, 2026

A Two-interval Forced-choice Task for Multisensory Comparisons
Published on: November 9, 2018
The intrinsic constraint model and Fechnerian sensory scaling
Fulvio Domini1, Corrado Caudek
1Department of Cognitive and Linguistic Sciences, Brown University, Providence, RI 02906, USA. Fulvio_Domini@brown.edu
Abstract:
The Intrinsic Constraint (IC) model of depth-cue integration (F. Domini, C. Caudek, & H. Tassinari, 2006) posits a strong link between perceived depth and depth discrimination, much like some Fechnerian theories of sensory scaling. K. J. MacKenzie, R. F. Murray, and L. M. Wilcox (2008) tested the IC model by examining whether two depth-matched pairs of stimuli are separated by equal numbers of Just Noticeable Differences (JNDs) in depth. They concluded that "IC is inconsistent with the psychophysics of depth perception." Here, by using a different methodological approach, we provide empirical findings that are consistent with the predictions of the IC model. We also discuss the relative merits of the IC and Modified Weak Fusion (MWF) models (M. S. Landy, L. T. Maloney, E. B. Johnston, & M. Young, 1995) of depth-cue combination.
Related Concept Videos
Scaling
Sensation
Absolute thresholds can quantify the sensitivity of sensory...
Modeling and Similitude
Depth Perception and Spatial Vision
Factors Affecting Perception
An illustrative example of a perceptual set is the scenario where an airline pilot told...
Sound Intensity Level
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and hence a...

