Dear SPMers
We´re planning a visuospatial working memory fMRI study and would like to incorporate a delayed-match-to-sample task with points as stimuli. Memory load is manipulated by showing either 1,3,7 or 9 points (in a 5 x 6 grid). After that a probe (1 point) is shown which occupies either the same position as one of the stimuli or a non-overlapping position. Participants have got to indicate whether the location of the probe point matches one of the locations of the previously shown points.
My question:
Is the paradigm suitable for a parametric analysis (by including the number of points during encoding -1/3/7/9- as a parametric modulator in the 1-level analysis)?
Thanks a lot & kind regards
Ben
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Dr. rer. nat. Benjamin Becker, Dipl.-Psych.
Department of Psychiatry
University of Bonn
Sigmund-Freud-Str. 25
53105 Bonn
Germany
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