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Kirschmann's Fourth Law

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posted on 2023-06-08, 19:48 authored by Jenny BostenJenny Bosten, J D Mollon
Kirschmann's Fourth Law states that the magnitude of simultaneous color contrast increases with the saturation of the inducing surround, but that the rate of increase reduces as saturation increases. Others since Kirschmann have agreed and disagreed. Here we show that the form of the relationship between simultaneous color contrast and inducer saturation depends on the method of measurement. Functions were measured by four methods: (i) asymmetric matching with a black surround, (ii) asymmetric matching with a surround metameric to equal energy white, (iii) dichoptic matching, and (iv) nulling an induced sinusoidal modulation. Results from the asymmetric matching conditions agreed with Kirschmann, whereas results from nulling and from dichoptic matching showed a more linear increase in simultaneous contrast with the saturation of the inducer. We conclude that the method certainly affects the conclusions reached, and that there may not be any "fair" way of measuring simultaneous contrast.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Vision Research

ISSN

0042-6989

Publisher

Elsevier

Issue

1

Volume

53

Page range

40-46

Department affiliated with

  • Psychology Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2015-01-27

First Open Access (FOA) Date

2016-03-22

First Compliant Deposit (FCD) Date

2015-01-27

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