Examlex
A radiation source used external to the body for therapeutic purposes must have a much shorter half-life than radioisotopes that are ingested for diagnostic purposes.
Square
A geometric shape with four equal sides and four right angles.
A-not-B Error
A cognitive mistake made by infants during the sensorimotor stage where they repeatedly reach for a hidden object at a location where it was last found (A) rather than its new location (B).
Motor Perseveration
The repetition of a particular movement or action despite the absence or cessation of the stimulus or intention that originally triggered it.
Infant
A very young child or baby, typically from birth to one year of age, during which rapid physical and cognitive development occurs.
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