rectangle
elements
One or more rectangles or squares. Options for border and solid or transparent fill also allow rectangular frames. You can also fill the experiment window if you want to change background color for just part of a trial (see property size).
(Transparency artifacts)
In the unusual case that you draw multiple rectangles with the same element and they overlap and you use transparency for one or more of them (properties color, borderColor below), you may need to set backColor = <cds>"opaque"<cds> for accurate display.
▸ Ends on its own?
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 a condition you set in property end.
Input properties
Adjustable properties
You can vary or allow the subject to adjust the following input properties of an object of this type in real time when it's running. If you need to make other properties adjustable, you can edit the element type code—see Element Type Programming Manual.
nn_eyes
rotation
colorMask
alpha
intensity
contrastMult
position
nn_eyes
rotation
colorMask
alpha
intensity
contrastMult
(None)
(None)
size
Default: a square with sides 5 deg
A number that is side length for a square, or a vector [width height] for a rectangle (deg). Or you can use multiple rows for different sizes for different rectangles—see positions below.
As a special case, you can set size = the number <cd>inf<cd> to fill the experiment window background with the rectangle. You can do this if you want to use it for background color for part of a trial (when the rectangle runs). Note in the common case that you want to set background color for a whole trial or the whole experiment, you can just use experiment object property backColor and/or trial object properties backColor and preTrialBackColor.
color
Default: white
A 1×3 RGB vector with numbers between 0–1 setting fill color. You can also use a 1×4 RGBA vector to give the fill color transparency, and set A = 0 for no fill. Or an n×3/4 matrix for different colors/transparencies for different rectangles—see positions below.
borderWidth
borderColor
Default: borderWidth = no border
Default: borderColor = white
borderWidth is a number (deg). Or a 1×n vector for different border widths for different rectangles—see positions below. 0 = no border.
borderColor is a 1×3 RGB vector with numbers between 0–1 setting border color. Or an n×3 matrix for different border colors for different rectangles—see positions below.
positions
Default: show one rectangle centered at element position
If you want to show multiple rectangles at the same time, you can set that here. This is more efficient than using multiple rectangle elements. positions is a 2-column matrix setting centers for the rectangles, with rows corresponding to rectangles and columns to [x y] coordinates (deg). Positions are relative to element position, which you can set in position (default relative to screen center). Rectangles are layered front-to-back in the order you list them.
If you show multiple rectangles then for each of the other properties above you can set one value for all of them, or you can set different values for different rectangles using a vector or matrix (see property).
<cd>[]<cd> = show one rectangle centered at element position.
Input properties all visual elements have
Input properties all adjuster elements have
Input properties all objects have
Record properties
PsychBench uses record properties to record information during experiments. You can't set record properties but you can see them in experiment results by listing them input property report.