Arduino for psychophysics 

Chrisantha Fernando 

I've been thinking about spending this week on a quite different project involving doing some psychophysics experiments with an arduino involving an array of LEDs and a button. Nothing too complicated, but I want the system to log the data and send it through serial to the computer for collection. 

The idea is to replicate and extend the following experiment 2, which is intended to look at the reaction time of subjects when required to identify whether an LED on one OR the other side of a fixation point is active. This can be contrasted with RT in AND and XOR tasks, with two stimuli L and R of a fixation point. As the discrimination becomes more complex, how does the RT scale, and can this be explained by parallel or serial processing? 

http://www.indiana.edu/~psymodel/papers/townoz95.pdf

Arduino has already been used for this purpose here... 

http://code.google.com/p/arduino-v-neusci/wiki/ControlPWM

http://code.google.com/p/arduino-v-neusci/wiki/Documentation

Basically I need a variant of the Posner test.

http://en.wikipedia.org/wiki/Posner_cueing_task
http://openeuroscience.wordpress.com/tutorials/human-psychophysics-using-arduino/