A class for presenting radial stimuli
Categories: Stimuli Works in: PsychoPy
Name of this component (alphanumeric or _, no spaces)
How do you want to define your start point?
Options: - time (s) - frame N - condition
How do you want to define your end point?
Options: - duration (s) - duration (frames) - time (s) - frame N - condition
When does the component start?
When does the component end? (blank is endless)
(Optional) expected start (s), purely for representing in the timeline
(Optional) expected duration (s), purely for representing in the timeline
Data
Store the onset/offset times in the data file (as well as in the log file).
Synchronize times with screen refresh (good for visual stimuli and responses based on them)
Disable this component
Units of dimensions for this stimulus
Options: - from exp settings - deg - cm - pix - norm - height - degFlatPos - degFlat
Position of this stimulus (e.g. [1,2] )
Size of this stimulus (either a single value or x,y pair, e.g. 2.5, [1,2]
Orientation of this stimulus (in deg)
Options: - -360 - 360
Foreground color of this stimulus (e.g. $[1,1,0], red )
In what format (color space) have you specified the colors? (rgb, dkl, lms, hsv)
Options: - rgb - dkl - lms - hsv
Opacity of the stimulus (1=opaque, 0=fully transparent, 0.5=translucent). Leave blank for each color to have its own opacity (recommended if any color is None).
Contrast of the stimulus (1.0=unchanged contrast, 0.5=decrease contrast, 0.0=uniform/no contrast, -0.5=slightly inverted, -1.0=totally inverted)
The (2D) texture of the grating - can be sin, sqr, sqrXsqr. or a filename (including path)
Options: - sin - sqr - sqrXsqr
An image to define the alpha mask (ie shape)- gauss, circle… or a filename (including path)
Options: - gauss - circle
Number of texture cycles from centre to periphery, i.e. it controls the number of ‘rings’.
Number of cycles going around the stimulus. i.e. it controls the number of ‘spokes’.
This is the phase of the texture from the centre to the perimeter of the stimulus (in radians). Can be used to drift concentric rings out/inwards.
This is akin to setting the orientation of the texture around the stimulus in radians. If possible, it is more efficient to rotate the stimulus using its ori setting instead.
Determines visible range.
How should the image be interpolated if/when rescaled
Options: - linear - nearest
Resolution of the texture for standard ones such as sin, sqr etc. For most cases a value of 256 pixels will suffice
Options: - 32 - 64 - 128 - 256 - 512