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Preregistrations

 

Preregistered Experiments

 

Adaptive Optics Studies (with the Morgan Lab)

Psychophysics Project

Preregistrations

 

Color Studies

SLC Project

This project compares measurements of simultaneous lightness contrast across a variety of contextual conditions.  The key manipuluation is that measurements obtained using real illuminated surfaces as stimuli are compared to measurements obtained using rendered computer graphics stimuli displayed on monitors. The broad goal is to understand the degree to which the graphics stimuli evoke the same performance as the real stimuli, and when there are deviations to understand what the critical differences between the graphics and real stimuli are.

Preregistrations

Illumination Discrimination

This project studies the ability of human subjects to make discriminations between changes in the illumination of scenes, with the goal of using these and related measurements to understand the nature and properties of the visual system's representation of illumination and object surfaces.  This project is collaborative with Anya Hurlbert's lab.

Preregistrations

Color-Material

This project studies how human subjects use object color and object material properties to identify and select objects.

Preregistrations

 

Melanopsin Studies (with the Aguirre Lab)

Perception

Control Population Stimulus Nulling Experiment 

This project studies the properties of melanopsin-directed spectral modulations, and asks how much cone contrast must be added to a nominally melanopsin-directed stimulus to minimize the visibility of that stimulus.

Preregistrations

Perceptual Ratings of Light Flux, Cone-Directed and Melanopsin-Directed Light Pulses

This project records psychophysical ratings of light-flux, melanopsin and LMS directed stimuli. The goal is to determine if the different stimulus classes elicit different percepts.

Preregistrations

Pupillometry

Comparison of monochromatic and silent-substitution evoked pupil responses

This project compares pupillary responses to monochromatic blue and red pulses and silent-substitution melanopsin- and cone-directed pulses.

Preregistrations

Pupillometry measures of melanopsin contrast - maximum melanopsin and LMS contrast pulses

This project studies pupil responses to high-contrast melanopsin- and cone-directed pulses.

Preregistrations

Comparison of monochromatic and silent-substitution melanopsin and LMS-directed evoked pupil responses

In this experiment, we are comparing pupil responses evoked by monochromatic blue and red light pulses to those evoked by silent substitution LMS-directed and melanopsin-directed stimuli.

Preregistrations

MaxMelLMS Pupil (17 second protocol)

This project studies pupil responses to high-contrast melanopsin- and cone-directed pulses using a shortened stimulus protocol.

Preregistrations

fMRI

Max Mel MRI

This project studies evoked brain responses to high-contrast melanopsin- and cone-directed pulses using BOLD fMRI.

Preregistrations

MaxMel/LMS CRF

This project studies evoked brain responses to melanopsin- and cone-directed pulses using BOLD fMRI at various contrast levels.

Preregistrations