Non-signing children

Isolated child signers

Signing children

Negation in sign languages (input)

Manual and non-manual categories of negation

Unity and diversity of sign languages

Gestures of negation

Gesture families according to their frames of reference

Degrees of freedom and propagation of the movement

Segmental origin and movement transfer

Data

Coding

Environmental and bimodal impact on the four children’s gestures of negation

Development of negation in the four little girls’ productions

Distribution of the two contrasted gestural patterns

Meaning and action pattern in Madeleine’s gestures produced with verbal negation

Polar invariants of gestural negation

Distribution according to semantic criteria

Distribution according to formal features