TY  - GEN
A1  - Felisatti, Arianna
A1  - Laubrock, Jochen
A1  - Shaki, Samuel
A1  - Fischer, Martin H.
T1  - Commentary
BT  - A mental number line in human newborns
T2  - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe
T3  - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 620 
KW  - spatial-numerical associations
KW  - SNARC
KW  - mental number line (MNL)
KW  - spatial frequency (SF)
KW  - temporal frequency
KW  - hemispheric asymmetry
KW  - newborns
KW  - embodied cognition
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-460413
SN  - 1866-8364
IS  - 620
ER  - 
TY  - GEN
A1  - Miklashevsky, Alex
A1  - Fischer, Martin H.
A1  - Lindemann, Oliver
T1  - Spatial-numerical associations without a motor response? Grip force says ‘Yes’
T2  - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe
N2  - In numerical processing, the functional role of Spatial-Numerical Associations (SNAs, such as the association of smaller numbers with left space and larger numbers with right space, the Mental Number Line hypothesis) is debated. Most studies demonstrate SNAs with lateralized responses, and there is little evidence that SNAs appear when no response is required. We recorded passive holding grip forces in no-go trials during number processing. In Experiment 1, participants performed a surface numerical decision task (“Is it a number or a letter?”). In Experiment 2, we used a deeper semantic task (“Is this number larger or smaller than five?”). Despite instruction to keep their grip force constant, participants' spontaneous grip force changed in both experiments: Smaller numbers led to larger force increase in the left than in the right hand in the numerical decision task (500–700 ms after stimulus onset). In the semantic task, smaller numbers again led to larger force increase in the left hand, and larger numbers increased the right-hand holding force. This effect appeared earlier (180 ms) and lasted longer (until 580 ms after stimulus onset). This is the first demonstration of SNAs with passive holding force. Our result suggests that (1) explicit motor response is not a prerequisite for SNAs to appear, and (2) the timing and strength of SNAs are task-dependent. (216 words).
T3  - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 810 
KW  - SNARC
KW  - Mental number line
KW  - Number processing
KW  - Embodied cognition
KW  - Grip force
KW  - Motor system
Y1  - 2023
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-578324
SN  - 1866-8364
IS  - 810
ER  - 
TY  - GEN
A1  - Fischer, Martin H.
A1  - Shaki, Samuel
T1  - Two steps to space for numbers
T2  - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe
T3  - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 412 
KW  - spatial-nunmerical association
KW  - SNARC
KW  - mental number line
KW  - numerical cognition
KW  - spatial cognition
Y1  - 2018
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-406522
IS  - 412
ER  - 
TY  - GEN
A1  - Sixtus, Elena
A1  - Lonnemann, Jan
A1  - Fischer, Martin H.
A1  - Werner, Karsten
T1  - Mental Number Representations in 2D Space
T2  - Postprints der Universität Potsdam Humanwissenschaftliche Reihe
N2  - There is evidence both for mental number representations along a horizontal mental number line with larger numbers to the right of smaller numbers (for Western cultures) and a physically grounded, vertical representation where “more is up.” Few studies have compared effects in the horizontal and vertical dimension and none so far have combined both dimensions within a single paradigm where numerical magnitude was task-irrelevant and none of the dimensions was primed by a response dimension. We now investigated number representations over both dimensions, building on findings that mental representations of numbers and space co-activate each other. In a Go/No-go experiment, participants were auditorily primed with a relatively small or large number and then visually presented with quasi-randomly distributed distractor symbols and one Arabic target number (in Go trials only). Participants pressed a central button whenever they detected the target number and elsewise refrained from responding. Responses were not more efficient when small numbers were presented to the left and large numbers to the right. However, results indicated that large numbers were associated with upper space more strongly than small numbers. This suggests that in two-dimensional space when no response dimension is given, numbers are conceptually associated with vertical, but not horizontal space.
T3  - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 538 
KW  - spatial-numerical associations
KW  - SNARC
KW  - vertical space
KW  - horizontal space
KW  - Go/No-go task
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-424960
SN  - 1866-8364
IS  - 538
ER  -