Modeling the effects of irrelevant speech on memory.

Area of Science:

• Cognitive Psychology
• Human Memory Research

Background:

• The feature model (Nairne, 1990) provides a framework for understanding immediate serial recall.
• Irrelevant speech and articulatory suppression are known to impair memory performance.

Purpose of the Study:

• To extend the feature model to incorporate the effects of irrelevant speech and articulatory suppression on immediate serial recall.
• To simulate and account for specific empirical findings related to these memory impairments.

Main Methods:

• Extension of the feature model to include noise parameters for irrelevant speech and articulatory suppression.
• Six computational simulations were conducted to test the model's predictions against existing data.

Main Results:

• The extended feature model accurately predicts the impairment caused by both irrelevant speech and articulatory suppression.
• The model accounts for the irrelevance of irrelevant speech content and increased disruption with varying tokens.
• It also explains the abolition of phonological similarity, word length, and irrelevant speech effects under specific conditions.

Conclusions:

• The extended feature model offers a robust explanation for the impact of irrelevant speech and articulatory suppression on immediate serial recall.
• The model's success in simulations supports its validity in explaining memory interference phenomena.