And I'll propose just another method:<br><br>For this to work the group number should be available in an attribute called group. I assume that you now use the startup info parameter 'group' to assign group. Is that correct? In that case the following should work: <br><br>Remove seven of the eight levels of the masterlist (Grouplist). When you do that, the group#lists from the removed levels are placed into the 'unreferenced objects' section of the experiment tree. Although this (to me at least) feels like a 'trashbin', it can also function as a 'storage place' and this is the way you'd want to use it now, so don't remove the lists from the 'unreferenced objects' section. Alternatively you could not even remove the last seven levels and simply set the list to exit after the first level (in sequential mode) but I feel that that is a bit more deceiving even than removing but still using certain lists. <br><br>Now at the beginning of your experiment procedure place an inline with the following code:<br><br>****<br>dim n as integer <br><br>for n = 1 to 8<br><br>if c.getattrib ("group") = n then grouplist.SetAttrib 1, "nested", "group"& n &"list"<br><br>next n<br><br>****<br><br>What it does: a loop is run for eight times. On each run it checks each value of 1-8 to see whether the group variable (= group number) is 1, 2, 3 etc. If the value of group is the same as the value of n within that specific loop, it replaces the nested list at the first (and only) level of grouplist with the list called 'groupxlist' wherein x is the value of n and therefore the value of the current participants group. Now each participant group's videos (stored in the newly nested groupnlist) should be used. <br><br>Best,<br><br>liw <br><br> <br><br><br><br><br>On Sunday, 11 March 2012 23:34:29 UTC+1, Rachel wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">Hi All,
<br>
<br>I have an extremely simple question that I know must be possible to
<br>do, but I simply cannot get it to work. I've read a jillion old forum
<br>posts, but it seems like everyone is asking a much more complicated
<br>question than I have, and so I can't find just a basic template to
<br>work off of.
<br>
<br>I have 8 subject groups, each with its own list of video stimuli. I
<br>want each subject to see all of the video stimuli from exactly one of
<br>these lists. I created a master list (GroupList) with 8 nested levels
<br>(Group1, Group2, ..., Group8) and in the master list, I set Selection
<br>to Counterbalance by Subject. However, instead of playing every video
<br>in the appropriate Group# list, it plays exactly 1 video and then
<br>exits. What is going on? How do I make it play every single trial in
<br>that one group list, and cycle through and choose a different group
<br>list for each new subject?
<br>
<br>For example, Subject1 should see all 118 videos in the Group1 list (in
<br>a random order); Subject2 should see all 118 videos in the Group2
<br>list; Subject3 should see all 118 videos in the Group3 list, and so on
<br>through all 8 Group# lists.
<br>
<br>This is really time-critical, especially since this seems to be
<br>exactly what the Counterbalance option should do, so as prompt a
<br>response as possible would be really appreciated.
<br>
<br>Thanks,
<br>Rachel</blockquote>
<p></p>
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