Millisecond Forums

Hi all,

I am creating a task where people watch a series of videos and answer autobiographical questions about themselves. The person is suppose to either see the videos first then the questions, or the questions first then the videos. I have two groups (group A and group B) of videos I want to randomized in terms of the order they appear (i.e. Group A first; Group B first), additionally I want to randomize the type of questions as well (i.e. Video first; Autobiographical questions first).

The issue is that Group A and Group B are presented in a loop where after each video, it branches to the question trial and the question trial branches to the next video. I was able to randomize the type of questions that are presented, but I having difficulties randomizing the groups. Also is there a way to branch the blocks where I do not have to repeat the introduction "NA_Intro" twice before each of the groups? Please advise!

**********Blocks***********

<block Intro>
/ trials = [1=introduction]
</block>

<block NA_A>
/ trials = [1=NA_Intro; 2=group_ANA; 3=group_ANA; 4=group_ANA; 5=group_ANA; 6=group_ANA; 7=group_ANA; 8=group_ANA]
/ recorddata = true
</block>

<block NA_B>
/ trials = [1=NA_Intro; 2=group_BNA; 3=group_BNA; 4=group_BNA; 5=group_BNA; 6=group_BNA; 7=group_BNA; 8=group_BNA; 9=group_BNA; 10=group_BNA]
/ recorddata = true
</block>

<block AB>
/ trials = [1=AB_Intro; 2=ftr_ab; 3=cur_ab; 4= hap_ab; 5=neu_ab; 6=sad_ab]
</block>

<block trial_end>
/ trials = [1 = trial_end]
</block>

**********Experiment Flow**********
<expt CAMS>
/ blocks = [1=Intro; 2-3=noreplace(NA, AB); 4=trial_end]
</expt>