Millisecond Forums

Hello,
on my study, I want to present two options to participants -- right now, in text form -- but would like to adjust the text based on the value of globals variabls (defined under values) that will change for each participant based on the scores obtained during a pre-callibration phase.

I wonder if:

1) the /items within a <text> can be dynamically modified based on the values of such global variables?
2) can the /position defined within a <text> be modifed also? I would like to "randomize" the positions of the options between left and right at each trial.

Below is some sample code of what I'm trying to do.

3) On a related topic, is it possible to dynamically chance the /caption of <sureypage>?

Any help would be greatly appreciated. Thanks a lot!

EN

--
<values>
//xxx
/ easyThresh50 = 8 //The number of boxes at the 50% level
/ mediumThresh65 = 10 //The number of boxes at the 65% level
/ mediumThresh80 = 13 //The number of boxes at the 80% level
/ hardThresh95 = 15 //The number of boxes at the 95% level
//yyy
/ low_pay = 2 //Low reward
/ medium_pay = 6 //Medium reward
/ high_pay = 10 //High reward
</values>

<text rest_1_cr>
/ items = ("<center>Rest<br>1 credit</center>")
/ txColor = (0, 0, 255)
/ txBGColor = (255, 255, 255)
/ position = (20%, 50%)
/ valign = top
/ halign = center
</text>

<text effort_n_cr>
/ items = ("<center>xxx boxes<br>yyy credits</center>")
/ txColor = (0, 0, 255)
/ txBGColor = (255, 255, 255)
/ position = (80%, 50%)
/ valign = top
/ halign = center
</text>

<trial bottomleftpractice>
/ stimulustimes = [0=rest_1_cr, effort_n_cr]
/inputdevice = mouse
/timeout = 10000
</trial>