Contingency looping

[Von Karolyi, Catya]

Hello again, 
  It was suggested that I (further) search the archives to answer my Contingency Looping question (revised and abridged below). I have now searched the archive using the terms:
 (Contingency or Contingent), (Loop or Looping), Input, Response, .RESP, (InLine or (IN Line)), (Slide or (Slide object)), (Animate or Animation), and I went through week by week for a few months. I also received and searched "VBA for Dummies), to no avail. 
   Does anyone, by any chance, either have a posting in mind that might address my problem or have a response to my questions? Thank you for any help you might be able to provide to me. 
Take care,
Catya von Karolyi
PS the Main frame computer can't spell my name correctly with a lower case "v"

~~~~~~~~~ORIGINAL MESSAGE~~~~~~~~~~~~
RE Contingency looping
>>...I'm hoping someone can direct me to the most effective
 way of accomplishing a contingency loop. My situation is as follows:
      My goal is ...(2) to have participant input determine the follow-up
 sequencing of a set of bitmaps presented in a Slide....When the participant responds at any given point in the original sequence (say, when two lines seem to be the same length) and the flow is redirected (Jumps to a Label?) to a customized sequence based on the point at which the response occurred.
   The new sequence, for example, might start at a point a few images further along in the sequence (when the two lines are clearly not the same length) and back-up to (and beyond) the point of the user's first input. (Or, conversely, back up a few images and redisplay the same sequence).
       ...I've got a List that repeatedly calls a Proc with a Slide Object set up with a generic image holder on a single slide. The List specifies (calls) the original sequence of bitmaps.
     I have failed to solve the second part of this task, even though I
 attempted to write InLine objects with different sequences. I can make it vary the sequence using <Set> and <ExplicitOrder>,  but I don't know how to tell it "start with this bitmap, on the basis of user input", I can't seem to control the flow correctly, and I can't seem to get the Slide to actually take the user input and jump...<<



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