dots
element objects
A static pattern of one or more dots. This uses Psychtoolbox Screen('DrawDots'), which draws dots that are limited in size. For larger circles, see element type circle.
(Transparency artifacts)
By default dots elements have a transparent background. In the unusual case that you draw multiple dots in the same dots element and they overlap and the top ones have transparency (property color below), you need to set property backColor = <cds>"opaque"<cds> for accurate display.
▸ Object ends on its own?
"Ends on its own" means ends automatically at that point. If an element can end on its own, you don't need to set end conditions for it in property end (unless you want it to maybe end earlier).
No—runs until any condition you set in property end.
positions
size
color
type
All visual elements
position
depth
nn_eyes
rotation
flipHorz
flipVert
colorMask
alpha
intensity
contrastMult
convolution
shader
filterOrder
filterGrayscale
filterResolutionMult
filterGamma
channelResolution
backColor
addDisplay
All visual elements
position
All adjuster elements have
adjust
All response handler elements
translateResponse
scoreResponse
correctResponse
scoreResponseForStaircase
maxNumResponses
recordDefaultResponse
registerTrigger
autoResponse
autoResponseLatency
All elements
start
end
startBuffer
endBuffer
vary
staircase
All objects
info
report
positions
Default: one dot at element position
A 2-column matrix setting dot centers, with rows corresponding to dots and columns to [x y] coordinates (deg). + = right/down and positions are relative to element position, which you can set in position (default relative to screen center). If dots overlap then they are layered front to back in the order you specify them. If you show multiple dots then for each of the properties below you can set one value for all of them, or different values for different dots using a vector or matrix (see property).
size
Default: 0.2 deg
A number setting dot diameter (deg). Or a 1×n vector for different diameters for different dots.
color
Default: white
A 1×3 RGB vector with numbers between 0–1 setting dot color. You can also use a 1×4 RGBA vector to give the dots transparency. Or an n×3/4 matrix for different colors/transparencies for different dots.
type
Default: 2 -> circles, prioritizing speed
A number corresponding to Psychtoolbox Screen('DrawDots') input dot_type, setting dot shape and draw method. Note that Psychtoolbox values are between 0–4 but this property is between 1–5.
Adjustable properties
You can vary or allow the subject to adjust the following properties of an object of this type when it's running. If you need to make other properties adjustable, you can edit the element type code—see Element Type Programming Manual.
Adjustable properties
Adjustable properties
position
nn_eyes
rotation
colorMask
alpha
intensity
contrastMult
drawCodeVars
(None)
(None)
PsychBench uses record properties to record information during experiments. You can't set record properties but you can see them in experiment results using input property report.
All response handler elements
response
responseScore
responseTime
responseLatency
d_responseTime
numResponses
All elements
startTime
endTime
duration
n_startFrame
n_endFrame
startLatencyBufferable
endLatencyBufferable