Stimulus.
The '$[Name]' stimulus was presented as a $[ContrastLuminanceType] pattern ($[Contrast] or $[Luminance] %) defined in a $[ContrastColorSpace:Name] space (with triplet [$[ContrastColorSpace:Val1], $[ContrastColorSpace:Val2], $[ContrastColorSpace:Val3]]) at the $[PositionCoordinates] location ($[PositionXR], $[PositionYTheta]) relative to the display center for a duration of $[Duration] seconds.