Two experiments examined the development of recollection (recalling qualitative details about an event) and familiarity (recognizing the event) using the dual-process signal detection model. In Experiment 1 (n = 117; ages 6, 8, 10, 14, and 18 years), recollection improved from childhood to adolescence after semantic encoding but not after…

In two studies, two year olds learned a novel word for a particular stuffed animal. When the animal was familiar, children interpreted the novel word as a proper noun. When the animal was unfamiliar, children frequently interpreted the novel word as a count noun referring to a kind of object. (BC)

In two experiments, preschoolers interpreted a novel count noun applied to an unfamiliar stuffed animal as referring to a basic-level (such as a person or a dog) kind of object rather than to a context (such as a passenger) or a life-phase (such as a puppy) kind of object. (MDM)