title: Perceptual constraints on infant memory retrieval.
abstract: In three experiments with 78 3-month-olds, we asked what determines whether or not a stimulus will pop out and cue retrieval from long-term memory. All infants were trained with mobiles displaying either Qs (feature-present stimuli) or Os (feature-absent stimuli) and were tested 24 h later. When the diagonal line of the Q bisected its rim, feature-absent stimuli controlled retrieval in tests with homogeneous displays, and stimulus novelty controlled retrieval in tests with pop-out displays. A follow-up experiment revealed that the similarity between Q and O determined whether or not Q popped out: When its tail projected externally from the rim, Q popped out and cued retrieval, but O did not (search asymmetry). When its tail projected internally from the rim, however, 3-month-olds failed to discriminate Q from O (the externality effect). These data reveal that target-distractor similarity constrains whether or not a feature-present stimulus will pop out and cue retrieval.
authors.affiliation: Rutgers University, Piscataway, NJ 08254-8020, USA.
authors.forename: P
authors.initials: P
authors.lastname: Gerhardstein
authors.forename: J
authors.initials: J
authors.lastname: Liu
authors.forename: C
authors.initials: C
authors.lastname: Rovee-Collier
mesh_terms: D001245:Association Learning; D001288:Attention; D004193:Discrimination Learning; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D011939:Mental Recall; D010364:Pattern Recognition, Visual; D002666:Psychology, Child; D012153:Retention, Psychology