Federico Tubaldi wrote:
> presentation order of experimental conditions is randomized within
> session: A1 D1 C1 B1 F1 E1 C2 A2 E2 D2 B2 F2.
>
> If I choice the high pass cutoff as based on twice the maximum interval
> between the most DISTANT repetition of an experimental condition [...]
> I get the same signal for each experimental condition but also noise
> passes because cut-off period is too great.
>
> If I choice the high pass cutoff as based on twice the maximum interval
> between the CLOSEST repetition of an experimental condition, [...]
> I minimise noise but I get different losses of signal for different
> experimental condition.
>
> How can I fix this trade-off problem? How do you suggest me to compute
> the high pass cut-off? Is it possible to get the same signal losses for
> all experimental conditions when the order is randomized?
Hi Federico,
Guessing, I would have to answer your last question above with no, I
don't think it is possible. I would also guess that your first option
(DISTANT) is safer than your second.
Maybe it would be preferable to use equally spaced (i.e.
non-randomised) presentation? [I know very little about the
disadvantages of this though]
Hopefully you'll get some more replies, as I'm far from certain about
this...
Ged.
|