

A face is more than just a number for young domestic chicks. Individual processing of face-like displays supports 3vs.4 discrimination.

Middle identification and spatial numerical bias in rhesus monkeys (Macaca mulatta)

Spatial bias in a spatial-ordinal task: Children show a left bias in identifying target positions

Brain Lateralization affects numerical performance and spatial numerical association

A strategy to improve arithmetical performance in four day-old domestic chicks (Gallus gallus)

Human-like perception of the ebbinghaus illusion in two distant species: Domestic chicks and redtail splitfins

Individual features facilitate stimulus processing in a proto-arithmetic task in newborn domestic chicks

Numerical magnitude spatially biases unusual responses

Number-space associations in neonates

Newborn chicks (Gallus gallus) discriminate proportions

The effect of brain asymmetry on biological motion perception in newborn chicks (Gallus gallus)

Representation of visual proportions in 4-day-old domestic chicks (Gallus gallus)

The larger shall be on the right side. Domestic chicks are better at identifying larger sets when these are located to their right side

Preliminary investigation of the representation of visual proportions in 4-day-old domestic chicks (Gallus gallus)

The representation of proportions in young domestic chicks

Arithmetic in newborn chick: the critical 3vs.4 condition

Left-right asymmetries in spatial numerical processing. Behavioural evidence from an animal model: the domestic chick (Gallus gallus)

One, two, three, four, something more? Proto-numerical discrimination in day old domestic chicks (Gallus gallus)

Asymmetrical number-space mapping in the avian brain

Object individuation in chicks: Use of Property/Kind information

Summation of large numerosities by newborn chicks

Baby Chicks Choose the Larger Quantity in the 4 vs 1 Comparison Employing Either Social or Food Attractors

From left to right: Humans only?

Arithmetic in newborn chicks

Discrimination between bidimensional representations of “possible” and “impossible” 3D objects in chicks.
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The consequences of Clever Hans’ story upon the investigation of animal numerical comprehension
When it was demonstrated that Hans’ mathematical calculations were due to an artifact, unintentionally given from his trainer, the belief on animal numerical capacities was plummeted.

An unfortunate beginning: The story of Clever Hans’ mathematical abilities
An initial attempt to study numerical abilities in animals is the famous story of Clever Hans.
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This project has received funding from the European Union’s Horizon 2020 research and innovation
programme under the Marie Sklodowska-Curie grant agreement No 795242
