Re: PNB vs DNB - Interesting results

It just proves that different modes are unrelated to each other and don't add up for a mutual benefit. It looks like they are just distractions preventing you from achieving higher results on a single n back.

On Saturday, May 21, 2011 7:28:04 PM UTC+2, Ian wrote:

So I decided to try position-n-back for a while in order to help train
myself in that area, as I am weaker in it than with audio, according
to my dnb results.

I've come across something interesting, and I am wondering if this
holds true for others as well.

I am only marginally better at PNB than DNB. I average P8B at high 60s
to very low 70s, where as I average D8B at mid 50s to low 60s. I would
have expected to be able to do around P10B or so, as I thought D8B
suggested I was keeping roughly 10 items in my head at once. (Not 16
items, as I can only do D8B at around 60% accuracy on average (I vary
from 50-70% and generally fall around 56-64%.). 16 Items would be if I
did D8B at 95%+.)

Now there may be a more reasonable explanation, and that is time.
Perhaps I am able to keep 10 items in my head at once, but only for a
very short period of time. Since the time between stimulus for DNB and
PNB is still the same (3 seconds), just the number changes, it's
possible that at 24 seconds (8 positons * 3 second delay each) I have
already lost quite a bit of information in my WM. Perhaps I can even
calculate the time at which information starts to decay for me. If so,
I can adjust the stimulus delay so that I can take in more stimuli
within the decay time. Of course, if the rate of presentation is too
fast, then the information will decay even faster.

I will try a 2.5 second delay and note the results.

Anyway, has anyone else here encountered the same phenomena? How do
your PNB results scale to your DNB results? Was it as you expected?

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