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Electroporation of the Hindbrain to Trace Axonal Trajectories and Synaptic Targets in the Chick Embryo
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ANIMAL COGNITION. Comment on "Number-space mapping in the newborn chick resembles humans' mental number line"
1Department of Psychological and Brain Sciences, Indiana University, Bloomington, IN 47405, USA.
Abstract:
Rugani et al. (Reports, 30 January 2015, p. 534) presented evidence that domestic chicks employ a "mental number line." I argue that the hypothesis testing used to support this claim unjustifiably assumes that domestic chicks are unbiased when choosing between identical stimuli presented to their left and right.

