I'd like to run a study in which participants freely surf the web. During their surfing, I'd like to send a series of randomly timed visual STRT probes. I've tried to do this in a MediaLab questionnaire file, with an HTML event followed by a DirectRT event that references a .csv file containing my probe sequence. This doesn't seem to work, as the probes are not embedded beneath the HTML event. Can anyone tell me if what I'm trying to do is possible with MediaLab/DirectRT? Any advice appreciated.