how to retrieve attribute info from a specific trial/line

[theorzak .]

Hi everyone,

I just start using E-prime to design a new experiment. As I am not familiar 
with the software, I have some difficulties in implementing some procedural 
conditions into the experiment. So in the experiment, there are two stages 
1) the decision making stage, 2) payment stage. In the decision making the 
participants are making a decision in a binary choice task (i.e., $100 for 
sure or $120 with 96%) across 480 trials. Each trial, the former option is 
fixed, but latter varies. I've programmed this stage (even though it is 
probably not the most efficient way - there are 480 lines in a list, 
different attributes - like risk, amount, sure amount etc-and they are 
being randomly presented).

My problem is about 2) payment stage. What I need to do is to randomly 
select 1 of these 480 trials (or lines), retrieve the relevant info 
regarding its attributes, and pay in accordance with the participant's 
choice:

So for instance one line/trial is randomly selected.
Say the "sure" attribute for that specific line is "$100 for sure, and the 
"risk" attribute is "$120 with 96% chance".

*Question 1 then: How could I retrieve the information re: attributes of a 
randomly selected trial/line?*

Say we found the line and the relevant attributes. Then I need to know the 
participant's decision for that specific trial (i..e, did the participant 
choose the "sure" or the "risky" option).

*Question 2: How could I retrieve info re: the participant's response for 
that specific trial?*

Then if the participant selected the "risky" one then s/he will indeed have 
a chance to receive $120 with 96%.

I think this is the easiest part - I can handle it.


I'd really appreciate any pointers re: Question 1 and Question 2. Thanks in 
advance...

Cheers,
Sule

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