We assume that the child knows the meaning of verbs and determiners such as get and the, therefore we simplify the familiar target condition in the form of the following input item: A familiar word such as ball has a meaning probability highly skewed towards its correct meaning.
upon hearing ball, the model can confidently retrieve its meaning ball, which is the one with the highest probability p(m|ball ) among all possible meanings m. In such a case, if ball is present in the scene, the model can easily pick it as the referent of the familiar target name, without processing the other objects in the scene.