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Forschungsdatenbank PMU-SQQUID

Neural correlates of distance and congruity effects in a numerical Stroop task: an event-related fMRI study.
Kaufmann, L; Koppelstaetter, F; Delazer, M; Siedentopf, C; Rhomberg, P; Golaszewski, S; Felber, S; Ischebeck, A;
NEUROIMAGE. 2005; 25(3):-98.
Originalarbeiten (Zeitschrift)


Golaszewski Stefan


This study aimed at investigating the neural correlates of a number-size congruity task. Using an event-related fMRI design, we presented one-digit number pairs to 17 participants in a number-size interference task that required subjects to focus on one stimulus property (e.g., numerical size) and to ignore the other (physical size). In different blocks, participants were asked to decide which digit of a digit pair was numerically larger (numerical comparison task) or physically larger (physical comparison task). Stimuli were classified into three categories: (a) congruent: physical and numerical comparison leads to the same response; (b) incongruent: physical and numerical comparison leads to different responses; (c) neutral: the stimuli differ only with regard to the task-relevant stimulus property. Behavioral results reflect robust distance effects (quicker reaction times for long distances relative to short ones) and size congruity effects (longer reaction times for incongruent relative to congruent stimuli) in both tasks. Imaging results reveal that-compared to congruent trials-incongruent trials led to a stronger activation in the dorsolateral prefrontal cortex and the anterior cingulate cortex, areas associated with attentional control. The distance effect (neutral condition only) led to a stronger activation in bilateral parietal areas including the intraparietal sulcus (IPS).

Useful keywords (using NLM MeSH Indexing)



Brain Mapping

Cerebral Cortex/physiology*


Conflict (Psychology)*

Discrimination Learning/physiology

Dominance, Cerebral/physiology


Frontal Lobe/physiology

Gyrus Cinguli/physiology


Image Enhancement*

Image Processing, Computer-Assisted*

Imaging, Three-Dimensional*

Magnetic Resonance Imaging*



Nerve Net


Parietal Lobe/physiology

Pattern Recognition, Visual/physiology*

Prefrontal Cortex/physiology

Problem Solving/physiology*

Reaction Time/physiology



Size Perception/physiology*

Find related publications in this database (Keywords)

numerical cognition
number comparison
number-size congruity effect
distance effect
intraparietal sulcus
anterior cingulate cortex
dorsolateral prefrontal cortex