Do Negative Numbers Have a Place on the Mental Number Line

By Martin H. Fischer, Julia Roitmann. 2005

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A study on the teaching of the concept of negative numbers (2010, background): “Researchers 7 , 13 , 14 studied cognitive representation of negative numbers through various standards and classifications.”
Mental number line, number line estimation, and mathematical achievement : Their interrelations in grades 5 and 6 (2009, background): “The average size of the SNARC effect conforms to previous studies on children of our age group (e.g., Bachot, Gevers, Fias, & Roeyers, 2005) and was somewhat larger than in previous studies on adults ( Fischer & Rottmann, 2005 ).”
Are Spatial-Numerical Associations a Cornerstone for Arithmetic Learning? The Lack of Genuine Correlations Suggests No (2015, background): “…material (Arabic numbers, number words, spoken number words, multi-digit and negative numbers or fractions, Dehaene et al., 1993; Fischer, 2003b; Fischer & Rottmann, 2005, Bonato, Fabbri, Umiltà & Zorzi, 2007), it was also investigated for non-symbolic arrays (Nuerk et al., 2005a; Patro &…”