HOW TO RUN RANDOMLY BLOCKS IN AN EXPERIMENT?


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dilemma
dilemma
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Hi there 
so below is my script...I want the experiment to run all the blocks but to run them randomly.
I tried the “random” and “noreplace” function but it does not work as it does only choose randomly one of the two blocks, while I want it to run all the blocks but in a random order the only time it works is in the last option that I reported (with nothing in front) but the problem it will run the blocks in the order that I have written them which is not what I want as it needs to be random!
Please advice for help!


<expt>
/ preinstructions = (intro1)
/ blocks = [ 1=noreplace(1a,1b); 2= 6; 3=noreplace(2a_1, 2a_2, 2a_3, 2a_4, 2a_5, 2a_6, 2a_7, 2a_8, 2a_9, 2a_10, 2a_11, 2a_12, 5a_1, 5a_2, 5a_3, 5a_4)]
/ postinstructions = (end)
/ subjects = (1 of 2)
</expt>

<expt>
/ preinstructions = (intro1)
/ blocks = [ 1=random(1a,1b); 2= 6; 3=random(2a_1, 2a_2, 2a_3, 2a_4, 2a_5, 2a_6, 2a_7, 2a_8, 2a_9, 2a_10, 2a_11, 2a_12, 5a_1, 5a_2, 5a_3, 5a_4)]
/ postinstructions = (end)
/ subjects = (1 of 2)
</expt>

<expt>
/ preinstructions = (intro1)
/ blocks = [ 1=1a,1b; 2= 6; 3=2a_1, 2a_2, 2a_3, 2a_4, 2a_5, 2a_6, 2a_7, 2a_8, 2a_9, 2a_10, 2a_11, 2a_12, 5a_1, 5a_2, 5a_3, 5a_4]
/ postinstructions = (end)
/ subjects = (1 of 2)
</expt>


Charlene_Wu
Charlene_Wu
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Dave - 10/30/2020
Charlene_Wu - 10/30/2020
Dave - 9/7/2015
It only runs a single block because that's what you specified. Instead of

<expt>
/ blocks = [1=noreplace(a,b,c)]
...
</expt>

you ought to specify

<expt>
/ blocks = [1-3=noreplace(a,b,c)]
...
</expt>

to run the 3 blocks a, b and c in random order.

Hi Dave,

I have a similar issue. In the <expt> of the file attached, you can see that I have 2 different EPTs, each with its own block. The first EPT has its orientation block (3 = orientationCvH), 2 rounds of the test block (4-5 = testCvH), and an end block (6 = endCvH). The other EPT is similar (7 = orientationVvS; 8-9 = testVvS;10 = endVvS). The EPTs need to remain in the same order of 1 orientation block + 2 test blocks + 1 end block.

I now wish to randomize these two EPTs such that some participants get blocks 3-6 first and others 3-10 first. I would like the rest of the script to stay the same.

How would I approach this? 

Thank you in advance!

// CvH first
<expt>
/ blocks = [
1 = eligibility;
2 = Demo;
3 = orientationCvH;
4-5 = testCvH;
6 = endCvH;
7 = orientationVvS;
8-9 = testVvS;
10 = endVvS;
11 = ExplicitRate;
12 = AMPpractice;
13-15 = AMP;
16 = FeelThermConVio;
17 = FeelThermThreeGroup;
18 = thankyou;
19 = ineligible]
/ subjects = (1 of 2)
/ groupassignment = groupnumber
</expt>

// VvS first
<expt>
/ blocks = [
1 = eligibility;
2 = Demo;
3 = orientationVvS;
4-5 = testVvS;
6 = endVvS;
7 = orientationCvH;
8-9 = testCvH;
10 = endCvH;
11 = ExplicitRate;
12 = AMPpractice;
13-15 = AMP;
16 = FeelThermConVio;
17 = FeelThermThreeGroup;
18 = thankyou;
19 = ineligible]
/ subjects = (2 of 2)
/ groupassignment = groupnumber
</expt>

Do I need to do anything to assign participants to different groups, or is it kind of automatic that they would just be randomly assigned to group 1 or ?
Charlene_Wu
Charlene_Wu
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Posts: 3, Visits: 4
Charlene_Wu - 10/30/2020
Dave - 10/30/2020
Charlene_Wu - 10/30/2020
Dave - 9/7/2015
It only runs a single block because that's what you specified. Instead of

<expt>
/ blocks = [1=noreplace(a,b,c)]
...
</expt>

you ought to specify

<expt>
/ blocks = [1-3=noreplace(a,b,c)]
...
</expt>

to run the 3 blocks a, b and c in random order.

Hi Dave,

I have a similar issue. In the <expt> of the file attached, you can see that I have 2 different EPTs, each with its own block. The first EPT has its orientation block (3 = orientationCvH), 2 rounds of the test block (4-5 = testCvH), and an end block (6 = endCvH). The other EPT is similar (7 = orientationVvS; 8-9 = testVvS;10 = endVvS). The EPTs need to remain in the same order of 1 orientation block + 2 test blocks + 1 end block.

I now wish to randomize these two EPTs such that some participants get blocks 3-6 first and others 3-10 first. I would like the rest of the script to stay the same.

How would I approach this? 

Thank you in advance!

// CvH first
<expt>
/ blocks = [
1 = eligibility;
2 = Demo;
3 = orientationCvH;
4-5 = testCvH;
6 = endCvH;
7 = orientationVvS;
8-9 = testVvS;
10 = endVvS;
11 = ExplicitRate;
12 = AMPpractice;
13-15 = AMP;
16 = FeelThermConVio;
17 = FeelThermThreeGroup;
18 = thankyou;
19 = ineligible]
/ subjects = (1 of 2)
/ groupassignment = groupnumber
</expt>

// VvS first
<expt>
/ blocks = [
1 = eligibility;
2 = Demo;
3 = orientationVvS;
4-5 = testVvS;
6 = endVvS;
7 = orientationCvH;
8-9 = testCvH;
10 = endCvH;
11 = ExplicitRate;
12 = AMPpractice;
13-15 = AMP;
16 = FeelThermConVio;
17 = FeelThermThreeGroup;
18 = thankyou;
19 = ineligible]
/ subjects = (2 of 2)
/ groupassignment = groupnumber
</expt>

Do I need to do anything to assign participants to different groups, or is it kind of automatic that they would just be randomly assigned to group 1 or ?

Sorry, group 1 or 2?
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