Dear forum,
I am struggling to build the following, and would greatly appreciate any help.
I want to deliver a "prime" (audio vignette), followed by a question on the strength of the "prime" (visual analogue scale/slider), followed by a "target" (an image, presented as continuous flash suppression). This question is not about the continuous flash suppression trials, so just consider the "target" to be an image presented within a trial.
There are 3 types of primes (positive, negative, none) and three types of targets (positive, negative, gabor).
There are 6 primes for each prime type (eg, 6 positive primes). Each prime will be used 3 times with different target types.
There are 36 targets (12 positive, 12 negative and 12 gabor).
This table might make it more clear:
Prime
| Target 1
| Target 2
| Target 3
|
Positive Vignette #1
| Positive
| Negative
| Gabor
|
Positive Vignette #2
| Positive
| Gabor
| Negative
|
Positive Vignette #3
| Negative
| Positive
| Gabor
|
Positive Vignette #4
| Negative
| Gabor
| Positive
|
Positive Vignette #5
| Gabor
| Positive
| Negative
|
Positive Vignette #6
| Gabor
| Negative
| Positive
|
Negative Vignette #1
| Positive
| Negative
| Gabor
|
Negative Vignette #2
| Positive
| Gabor
| Negative
|
Negative Vignette #3
| Negative
| Positive
| Gabor
|
Negative Vignette #4
| Negative
| Gabor
| Positive
|
Negative Vignette #5
| Gabor
| Positive
| Negative
|
Negative Vignette #6
| Gabor
| Negative
| Positive
|
No Vignette
| Positive
| Negative
| Gabor
|
No Vignette
| Positive
| Gabor
| Negative
|
No Vignette
| Negative
| Positive
| Gabor
|
No Vignette
| Negative
| Gabor
| Positive
|
No Vignette
| Gabor
| Positive
| Negative
|
No Vignette
| Gabor
| Negative
| Positive
|
All primes to be presented in random order, with a given prime
never presented closer than 4 trials apart.All targets to be presented in random order, though constrained to deliver the above
18 sequence types per prime type.
(One such sequence would be that if a given positive prime is paired with a positive target, then the next time it appears it should be paired with either a negative or a gabor target. If it is paired with a negative target on its second appearance, it should be paired with a gabor at its third. etc. Each prime type (eg positive) should cover all 18 possible sequence types, as the table shows).
I am not very familiar with conditionality code.
Apologies if this is confusing, and many thanks in advance!
paul