Stimulus Labels Support Declarative but Not Procedural Memory in Children With and Without Hearing Loss.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Developmental Psychology

Background:

• Children with hearing loss often exhibit challenges in sequential learning (procedural memory) and verbal serial recall (declarative memory).
• Pediatric cochlear implant (CI) users, particularly those implanted at young ages, are a key population for studying memory development and auditory rehabilitation.

Purpose of the Study:

• To investigate sequential learning and serial recall in pediatric cochlear implant (CI) users.
• To examine the influence of rehearsal on procedural and declarative memory.
• To determine if rehearsal impacts the generalization of procedurally learned sequences to declarative serial recall.

Main Methods:

• Sixty children (7-15 years; 21 CI users, 39 typically hearing) completed serial reaction time (SRT) tasks with verbalizable ('Color') and spatial ('Monster') stimuli.
• Following SRT tasks, participants performed serial recall, with half of trials incorporating the procedurally learned sequence.

Main Results:

• Hearing status did not predict performance in sequential learning or serial recall, contrasting with prior research.
• All children benefited from easily accessible labels in declarative serial recall.
• Prior procedural learning enhanced declarative recall, but only when stimuli lacked easily accessible labels.

Conclusions:

• Pediatric CI users effectively employ strategies like rehearsal and prior sequence learning for serial recall.
• The study highlights an asymmetry in serial recall: language abilities predict recall of easily labeled items, while nonverbal IQ predicts recall of difficult-to-label items.