pedro,
Most of the variables calculated are documented in various
neuropsychological testing books. There are references in the report
file to look these up, and many come from the PAR manual, which we base
the PEBL version on roughly.
To answer further questions:
* 'Perseverations' is just a count of whether they used the same
response as the previous trial. These are not necessarily errors. Most
people are not interested in total perseverative errors,, which is what
totperserr is.
* The PAR-derived measures use a sandwich rule to determine whether
something is an error or a persevaration. it is quite complex and cannot
be calculated until after the test is completed. You can examine the
PAR manual for that, or review the code. We have tested the PAR score on
a sample of about 200 participants and found that it is correct for all
those cases; and furthermore the error rate for hand-scoring according
to the PAR guidelines were substantial. The PEBL perseveration score is
much less conservative and will call things as persevarative errors that
the PAR will not. I don't know if there are any head-to-head
comparisons of whether one is more valid, but we provide both for
compatibility. Learning-to-learn is documented in neuropsych handbooks
that describe WCST measures. It is the mean differential increase in
accuracy after the first set. If you got 5% better on each set,
learning-to-learn would be .05.
On 2020-11-09 1:52 pm, Pedro Heredia Medio via Pebl-list wrote:
Hi,
Not sure if this is the correct forum to post this - apologies, I´m new to this!
I am researching if there are any differences between bilingual and monolingual samples in inhibitory control and cognitive flexibility. I would like to assess this by using two batteries, the victoria stroop to measure inhibitory control and the Wisconsin Sorting Card Test to measure flexible cognitivity. I am struggling to understand how some of the variables in the output data file for the WSCT are calculated. Specifically I was hoping someone could help me understand the following:
1) What´s the difference between "totPers" and "totPersErr"?
2) How is "learning to learn", "conceptual" and the "PAR" variables calculated?
Again apologies if this is not the correct place to ask. I´ve tried the PEBL manual, discussion forums and google and haven´t found anything to help me answer my questions.
Your help is much appreciated :)
Thanks!
Pedro
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