TY  - JOUR
A1  - Shaki, Samuel
A1  - Fischer, Martin H.
T1  - Competing Biases in Mental Arithmetic
BT  - When Division Is More and Multiplication Is Less
JF  - Frontiers in human neuroscience
N2  - Mental arithmetic exhibits various biases. Among those is a tendency to overestimate addition and to underestimate subtraction outcomes. Does such “operational momentum” (OM) also affect multiplication and division? Twenty-six adults produced lines whose lengths corresponded to the correct outcomes of multiplication and division problems shown in symbolic format. We found a reliable tendency to over-estimate division outcomes, i.e., reverse OM. We suggest that anchoring on the first operand (a tendency to use this number as a reference for further quantitative reasoning) contributes to cognitive biases in mental arithmetic.
KW  - heuristics and biases
KW  - numerical cognition
KW  - mental arithmetic
KW  - mental number line
KW  - operational momentum
Y1  - 2017
U6  - https://doi.org/10.3389/fnhum.2017.00037
SN  - 1662-5161
VL  - 11
PB  - Frontiers Research Foundation
CY  - Lausanne
ER  - 
TY  - JOUR
A1  - Pinhas, Michal
A1  - Shaki, Samuel
A1  - Fischer, Martin H.
T1  - Addition goes where the big numbers are: evidence for a reversed operational momentum effect
JF  - Psychonomic bulletin & review : a journal of the Psychonomic Society
N2  - Number processing evokes spatial biases, both when dealing with single digits and in more complex mental calculations. Here we investigated whether these two biases have a common origin, by examining their flexibility. Participants pointed to the locations of arithmetic results on a visually presented line with an inverted, right-to-left number arrangement. We found directionally opposite spatial biases for mental arithmetic and for a parity task administered both before and after the arithmetic task. We discuss implications of this dissociation in our results for the task-dependent cognitive representation of numbers.
KW  - Mental arithmetic
KW  - Mental number line
KW  - Operational momentum
KW  - Pointing
KW  - SNARC
Y1  - 2015
U6  - https://doi.org/10.3758/s13423-014-0786-z
SN  - 1069-9384
SN  - 1531-5320
VL  - 22
IS  - 4
SP  - 993
EP  - 1000
PB  - Springer
CY  - New York
ER  - 
TY  - JOUR
A1  - Felisatti, Arianna
A1  - Laubrock, Jochen
A1  - Shaki, Samuel
A1  - Fischer, Martin H.
T1  - Commentary
BT  - A mental number line in human newborns
JF  - Frontiers in Human Neuroscience
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  - https://doi.org/10.3389/fnhum.2020.00099
SN  - 1662-5161
VL  - 14
PB  - Frontiers Research Foundation
CY  - Lausanne
ER  - 
TY  - JOUR
A1  - Fischer, Martin H.
A1  - Miklashevsky, Alex A.
A1  - Shaki, Samuel
T1  - Commentary : The Developmental Trajectory of the Operational Momentum Effect
JF  - Frontiers in Psychology
KW  - embodied cognition
KW  - operational momentum
KW  - SNARC effect
KW  - mental arithmetic
KW  - numerical cognition
Y1  - 2018
U6  - https://doi.org/10.3389/fpsyg.2018.02259
SN  - 1664-1078
N1  - A Commentary on The Developmental Trajectory of the Operational Momentum Effect by Pinheiro-Chagas, P., Didino, D., Haase, V. G., Wood, G., and Knops, A. (2018). Front. Psychol. 9:1062 doi: 10.3389/fpsyg.2018.01062
VL  - 9
PB  - Frontiers Research Foundation
CY  - Lausanne
ER  -