Dataset: "Importance of hue: the effect of saturation on hue–chroma asymmetries"

This dataset contains observer data and stimulus information for the below publication. Refer to this manuscript for more details.

Laysa Hedjar, Matteo Toscani, and Karl R. Gegenfurtner, "The importance of hue: the effect of saturation on hue–chroma asymmetries," Journal of the Optical Society of American A 42(5), 1-8 (2025), doi:10.1364/JOSAA.544641

Experimental participant data is available in two files:

thresholds.csv

ptID: participant ID number

JND (DT units): just-noticable difference threshold in detection threshold units

chroma radius: distance of the reference color from the achromatic axis in detection threshold units

quadrant: quadrant of DKL color space

color dimension: dimension of color difference (hue or chroma)

direction: direction of color difference (increasing or decreasing for chroma, clockwise [cw] or counter-clockwise [ccw] for hue)

PSEs.csv

ptID: participant ID number

chroma of reference (DT units): distance of the reference color from the achromatic axis in detection threshold units

quadrant of reference: quadrant of reference color in DKL color space

chroma of test (DT units): distance of test color from achromatic axis in detection threshold units (point of subjective equality of saturation)

quadrant of test: quadrant of test color in DKL color space

Participant data used to scale DKL color space is available in detection_thresholds.csv:

ptID: participant ID number

JND (arbitrary DKL units): just-noticable detection threshold

angle: angle measured in DKL color space (Angle 0 is the positive L-M axis, Angle 90 is the positive S-(L+M) axis)