Prior-list intrusions in serial recall are positional

Area of Science:

• Cognitive Psychology
• Human Memory

Background:

• Serial recall models, such as chaining models, have been challenged by positional intrusion data.
• Previous demonstrations of positional intrusions used small, repeatedly used item sets.
• Recent studies with large, non-reused item sets (open sets) suggest chaining models may be viable.

Purpose of the Study:

• To test the viability of pure chaining models in open-set serial recall conditions.
• To investigate whether positional intrusions occur in open-set designs.
• To determine if positional representations are necessary for explaining serial recall in open-set environments.

Main Methods:

• Conducted two experiments using open sets of items, where items were not reused across trials.
• Analyzed intrusion patterns from the immediately preceding list during serial recall.
• Compared findings to predictions from chaining models lacking positional representations.

Main Results:

• Intrusions from the prior list showed a significant tendency to appear in their original positions.
• This positional intrusion effect was observed in the open-set design.
• Results indicate that positional information is utilized in open-set serial recall.

Conclusions:

• A pure chaining model without positional representations is insufficient for explaining serial recall in open-set conditions.
• Positional representations play a role in serial recall even when large, unique item sets are used.
• Findings support the importance of positional information in memory recall mechanisms.