Processing stage flexibility of the SNARC effect: Task relevance or magnitude relevance?

Area of Science:

• Cognitive psychology
• Neuroscience
• Human cognition

Background:

• The spatial-numerical association of response codes (SNARC) effect processing stage is known to be flexible.
• Previous studies yielded contradictory results regarding SNARC effect occurrence in the semantic-representation stage.
• Contradictory findings stemmed from variations in task type and semantic interference information.

Purpose of the Study:

• To investigate the factors influencing the SNARC effect in the semantic-representation stage.
• To reconcile contradictory findings from previous studies on the SNARC effect.
• To determine whether task type or interference information primarily affects the SNARC effect.

Main Methods:

• Four experiments were conducted, switching Stroop effects in magnitude comparison and parity judgment tasks.
• Investigated the influence of magnitude Stroop effect and parity Stroop effect on the SNARC effect.
• Utilized a two-stage processing model to analyze the SNARC effect.

Main Results:

• The SNARC effect was not influenced by the parity Stroop effect in the magnitude comparison task.
• The SNARC effect was influenced by the magnitude Stroop effect in the parity judgment task.
• Magnitude-relevant interference information consistently affected the SNARC effect, irrespective of task type.

Conclusions:

• Magnitude-relevant interference is the primary factor influencing the SNARC effect in the semantic-representation stage.
• The findings support a two-stage processing model explaining the flexibility of the SNARC effect.
• Clarified the conditions under which the SNARC effect is modulated by semantic interference.