Too much Randomization

[L4lab]

I am working in DirectRT and I am attempting to do RWG. While DirectRT does randomize the tasks, it does so in such a way that it repeats one line instead of randomizing the four and using each of those four only once (as we would like it to do).

For example:
---The Input---

block-trial-RBG-RWG-stim

1 1 0 1 triangle

1 2 0 1 ball 

1 3 0 1 heart 

1 4 0 1 star

---The Resulting Orders----

Test 1 Test 2 Test 3 

-triangle -heart -star 

-star -star -ball 

-heart -ball -triangle 

-triangle -star -triangle

Is there a way to randomize the trials such that the results would appear as:

Test 1 Test 2 Test 3, etc. 

-triangle -heart -star 

-heart -star -ball 

-heart -ball -triangle 

-ball -triangle -heart

so that each trial is randomized but only appears once in a test?

[jarvis24]

Yes, there is. Remember that any items sharing the same RWG value go into the same pool for randomization. Checking your input file, see that you have a "1" assigned to all of your trials across all of your blocks? Try, instead, using the same value only within blocks. So, e.g., try using an RWG value of "2" in your second block, "3" in your third block and so on. Let me know if that helps!

-Blair

[L4lab]

Ah-ha! Your suggestion worked. Thank you!