$[STIMULUSSECTION=No]{

Stimuli.

}

$[Name] Stimulus.

The '$[Name]' $[MEF?1]{micro-element}$[MEF?0]{stimulus} was generated with the following analytical expression:

$[Expression]

where x, y, r, theta are Cartesian and polar 2D coordinates and the parameters values defined as follow:

$[ParamsList]


$[STIMULUSPREVIEW]
Figure $[FIGURENUMBER]: Example of $[Name] stimulus

This stimulus was defined in the $[ContrastColorSpace:Name] space $[ContrastColorSpace:Name<>Achromatic]{(in the direction defined by the tri-stimulus [$[ContrastColorSpace:Val1], $[ContrastColorSpace:Val2], $[ContrastColorSpace:Val3]])} and its $[ContrastLuminanceType] was set to $[ContrastLuminanceType=Contrast]{$[Contrast]}$[ContrastLuminanceType=Luminance]{$[Luminance]}%. $[RDK?0]{$[MEF?0]{$[SSS?0]{ It was displayed at the $[PositionCoordinates] location ($[PositionXR], $[PositionYTheta]) relative to the display centre for a duration of $[Duration] seconds. }}} $[MEF?1] { $[MEF:VARIABLENBELEMENTS?1]{A variable number ($[MEF:VARIABLENBELEMENTS] % of total)}$[MEF:VARIABLENBELEMENTS?0]{A fixed number ($[NbElements] or $[MEF:PercentElements] % of total)} of instances of this stimulus were $[MEF:Distribution=Random]{randomly} pasted in the multi-elements field with a specific rotation ($[MEF:CoherentRotation]) with some spatial jitter (according to a uniform distribution in the ±$[MEF:SpatialJitter] deg range) and orientation jitter (according to a uniform distribution in the ±$[MEF:OrientationJitter] deg range). $[MEF:Lifetime<>infinity] { Each element had a limited-lifetime of $[MEF:Lifetime] seconds after which they were $[MEF:LifetimeMode=Field Update Async]{repositioned asynchronously at the same grid location but with different spatial and orientation jitters.} $[MEF:LifetimeMode=Field Update Sync]{repositioned synchronously at the same grid location but with different spatial and orientation jitters.} $[MEF:LifetimeMode=On-Off Async]{disappearing asynchronously for the same duration before reappearing at the same location.} $[MEF:LifetimeMode=On-Off]{disappearing asynchronously for the same duration before reappearing at the same location.} $[MEF:LifetimeMode=On-Off Sync]{disappearing synchronously for the same duration before reappearing at the same location.} $[MEF:LifetimeMode=Shuffle Async]{repositioned asynchronously at a different grid location with different spatial and orientation jitters.} $[MEF:LifetimeMode=Shuffle Sync]{repositioned synchronously at the different grid location with different spatial and orientation jitters.} } } $[RDK?1] { $[RDK:VARIABLENBELEMENTS?1]{A variable number ($[RDK:VARIABLENBELEMENTS] % of total)}$[RDK:VARIABLENBELEMENTS?0]{A fixed number ($[RDK:DotsNumber] or $[RDK:CoherenceLevel] % of total)} of instances of this stimulus were randomly pasted in a $[RDK:ZoneShape=Disk]{circular} RDK area with a diameter of $[RDK:ZoneSize] deg located at the $[RDK:PositionCoordinates] location ($[RDK:PositionXR], $[RDK:PositionYTheta]) relative to the display centre, and moving with a speed of $[RDK:DotSpeed] deg/s according to a $[RDK:MotionType] motion $[RDK:MotionType=Uniform]{in a $[RDK:CoherentDirection] deg direction} for a duration of $[RDK:Duration] seconds. $[RDK:Lifetime<>infinity] { Each element had a limited-lifetime of $[RDK:Lifetime] seconds after which they were randomly repositioned inside the area.
} } $[TIMELINE=Yes] { $[OnsetMode?1] { This stimulus was presented with $[OnsetMode=0]{a stimulus onset asynchrony (SOA)}$[OnsetMode=1]{an inter-stimulus interval (ISI)} of $[Onset] seconds relative to the $[SOAEvent?0]{timeline onset}$[SOAEvent?1]{'$[SOAEvent]' stimulus}. } }