Number Bisection Task

FREE for use with an Inquisit Lab or Inquisit Web license.

Available Test Forms

Number Bisection Task

A mathematical task in which participants judge whether a center number is the arithmetic mean of the flanking numbers as described in Nuerk et al (2002)
Duration: 45 minutes
(Requires Inquisit Lab)
(Run with Inquisit Web)
Last Updated


Google ScholarSearch Google Scholar for peer-reviewed, published research using the Inquisit Number Bisection Task.

Nuerk, H., Geppert, B., van Herten, M., & Willmes, K. (2002). On the impact of different number representations in the number bisection task. Cortex, 1, 691–715.

Droit-Volet, Clément, & Fayol. (2003). Time and number discrimination in a bisection task with a sequence of stimuli: A developmental approach. Journal of Experimental Child Psychology, 84(1), 63-76.

Moeller, Fischer, Nuerk, & Willmes. (2009). Eye fixation behaviour in the number bisection task: Evidence for temporal specificity. Acta Psychologica, 131(3), 209-220.

Ashkenazi, & Henik. (2010). A disassociation between physical and mental number bisection in developmental dyscalculia. Neuropsychologia, 48(10), 2861-2868.

Moeller, Wood, Doppelmayr, & Nuerk. (2010). Oscillatory EEG correlates of an implicit activation of multiplication facts in the number bisection task. Brain Research, 1320(C), 85-94.

Pletzer, Kronbichler, Ladurner, Nuerk, & Kerschbaum. (2011). Menstrual cycle variations in the BOLD-response to a number bisection task: Implications for research on sex differences. Brain Research, 1420, 37-47.

Fernandez Cruz, Arango-Muñoz, & Volz. (2016). Oops, scratch that! Monitoring one’s own errors during mental calculation. Cognition, 146, 110-120.