[solved] Dynamic visual search experiment
I'm trying to create a simple visual search experiment in which a variable number of objects move around randomly on screen throughout the trial. A target (defined by colour) may be present or absent on each trial. I've been trying to adapt the code from a previous request for a multiple-object-tracking experiment (http://forum.cogsci.nl/index.php?p=/discussion/277/open-using-opensesame-for-m-o-t-task/p1). That code generates displays which are ALMOST exactly what I need.
That is, it gives me:
- A fixation screen containing items in a starting position
- Items that move around at a specified velocity, avoiding one another and elastically bouncing back from the display boundaries.
All I need in addition is to have one target maintain its different colour throughout the trial, and have the trial terminate with a keypress.
Can anyone help?