a random dot kinematogram implemented in pygame The RDK is fully customisable, i.e. you can change its colour, size, dot coherence, duration of display etc. Each frame is written to a numpy array and returned by the RDK object, which makes this implementation suitable for simulations etc.
The easiest way to get started is to call the rdk script and play around with different parameters
I've also implemented a fixation cross and aperture, as well as a separate class to define trial sequences.
Below is an example:
The coherence of random dot motion, i.e. the percentage of dots moving in the requested direction, can be varied parametrically.
1. Example with coherence of 100%
2. Example with coherence of 50%
3. Example with 0% coherence
Both the number of dots and their size can be adjusted.
1. Example with small and many dots
2. Example with few and large dots
You can also change the speed with which dots move over the screen (in terms of pixels per frame)
1. Slow dots
2. Fast dots
