Purpose of review: A sensitive period in development is one in which it is easier for learning to take place; the behaviour can however still be learned at a later stage, but with more difficulty. This is in contrast to a critical period, a time at which a behaviour must be learned, and if this window of opportunity is missed, then the behaviour can never be acquired. Both might determine food acceptance in childhood.
Recent findings: There is evidence to support the idea of a sensitive period for the introduction of tastes, a critical period for the introduction of textures and for the development of oral motor function, and a possible critical period for the introduction of new foods but only in children where there is an innate disposition to develop early and extreme disgust responses.
Summary: There are both sensitive and critical periods in the acquisition of food preferences.
Keywords: Childhood; Critical periods; Disgust; Feeding eating; Infancy; Neophobia; Oral motor function; Sensitive periods; Sensory hypersensitivity; Tactile defensiveness.