BSAV and Brake RT

Joined: 06 Jul 2007 Posts: 21

Hi. I'm trying to record data for an entire block, but when the Brake RT event is introduced. The rest of the data gets truncated. Any idea why this is the case? - I'm probably not doing something correctly. Any help is much appreciated. Here is a sample of the code that i'm using.

2900, RT, 0, 10
2000, BSAV, 1,.0017, BLOCK1, (All the relevant parameters)
10000, ESAV

I understand that the RT event calls the PDE event ReactionTime.PDE, and within that PDE, it has it's own BSAV instructions. Is this the reason why data from 3000 FT onward is getting truncated? Is there any way around this?

Thank you.

Joined: 09 Mar 2005 Posts: 62

Yes the brake reaction time PDE is the problem. You can just comment out the BSAV line in the brake reaction time PDE by putting a negative in front of it. If you still want the same data as the brake reaction time, copy the relevant parameters and use them in your BSAV line.

Joined: 06 Jul 2007 Posts: 21

1. I want to look at reaction times to the RT event that i placed as a PDE in the scenario.

2. I didn't place an ESAV at the end of the PDE, because i didn't want data to get truncated.

3. I rarely look at the summary data at the end of the drive because, what i'm looking for is usually in the raw data.

4. Now that i've actually gone back to check, it appears that i do not have any RT data.

Here are a few possibilities that i thought might be the problem.
a) I didn't place ESAV at the end of the scenario
b) I always have a 'sub-script out of range' error that occurs at the of my drives - not a problem as i still get the raw data. BUT i do not get the opportunity to key in the braking threshold - could that be a problem?
---
What are some of the ways that i can remedy this to get my RT data?
1. Since all the input data is saved in the plb files, can i re-run the scenarios to get the RT data?
2. Look at the raw data and locate the raw data for braking input: i.e. 66535 = no input
Anything that differs from that is an indicator of the participant applying force to the brakes.
Along the same vein, how does STISIM drive calculate braking RT? What parameters does it use?

Thanks.