Please help! I'm an undergrad using Media Lab for the first time, and I have run into a major roadblock with my experiment. I've perused the Forums and Help Manual, but haven't been able to get this figured-out.
Experiment Design: Subjects are presented stimuli via animated power points. Some objects will be moving, some will not. At 3200ms, all stimuli will change. One will become a target (either S or H) that the subject must identify via correct keystroke. The program must record the latency from the time the target appears to when the subject responds. It must also determine correct from incorrect responses.
Suggestion from my professor: Set the stimuli as a background video and use Media Lab's scaled response in the foreground for subject response. He said Direct RT is very difficult, so he suggests I avoid using it. From what I can tell, Direct RT may be the only way I can get this to work. I have made numerous attempts to convert the .pps files into a video format that Media Lab can use, with no success.
1) I found a program that converted to .avi, but the animation was choppy and slow
2) Screen capture programs also resulted in choppy & slow animation
3) Converted to flash to be embedded in an HTML doc for use as background, but there was major artifacting around the moving stimuli
Question: From all that I've read in the Help Manual and Message Board, it appears that I will have to use Direct RT in conjunction with Media Lab. I've learned the basics of Media Lab, but I have no idea where to start when it comes to learning Direct RT. I have less than a week before I need to start running subjects, and we are not covering how to use the programs in class. Any ideas? Even just pointing me in the right area of the Direct RT manual would be helpful.
I have attached one of the zipped .pps files for reference. Any help would be greatly appreciated!
Thanks!
Vickie