The link between working memory and fluid intelligence is dependent on flexible bindings, not systematic access or...

Area of Science:

• Cognitive Psychology
• Neuroscience
• Psychometrics

Background:

• The relationship between working memory (WM) and fluid intelligence (Gf) is debated, with some viewing WM as subordinate to Gf.
• Emerging theories suggest a common basis in the ability to form and manipulate relational bindings between representations.

Purpose of the Study:

• To investigate the role of relational binding flexibility in the WM-Gf relationship.
• To differentiate between information access and retention within working memory tasks.
• To determine if specific task demands, like random-order processing, are necessary to reveal the common WM-Gf factor.

Main Methods:

• 122 participants completed the Arithmetic Chain Task (ACT) with fixed-order and random-order access conditions.
• Participants also completed measures of working memory and fluid intelligence.
• The ACT was manipulated to contrast information access (integrating information for processing) with retention (holding information for recall).

Main Results:

• Findings confirmed a distinction between information access and retention, as previously shown.
• Random-order access, which prevents systematic chunking, was necessary to reliably differentiate access from retention.
• Only the random-order access condition of the ACT significantly correlated with a common factor of WM and Gf.

Conclusions:

• The common variance between working memory and fluid intelligence is not simply capacity, but the ability to maintain multiple, durable, and flexible bindings.
• Random-order processing, demanding flexible binding updates, is critical for accessing this shared cognitive resource.
• These results support a binding-based account of the WM-Gf relationship.