The role of working memory in spatial enumeration: patterns of selective interference in subitizing and counting

Area of Science:

• Cognitive Psychology
• Neuroscience
• Working Memory Research

Background:

• Articulatory suppression is theorized to selectively impair the phonological store in working memory.
• Prior research shows suppression affects temporal enumeration but provides little evidence for interference in spatial enumeration.

Purpose of the Study:

• To investigate the impact of articulatory suppression on spatial enumeration.
• To examine whether secondary tasks interfere with the ability to enumerate items presented spatially.

Main Methods:

• Participants performed a spatial enumeration task involving counting dots (1-8).
• A baseline condition involved listening to a metronome, while a dual-task condition included secondary tasks like simple/complex articulation or tapping.
• The study compared performance in baseline versus dual-task conditions.

Main Results:

• Articulatory suppression demonstrated interference with spatial enumeration, contrary to previous findings.
• The degree of interference varied with the number of items being enumerated.
• The pattern of interference in spatial enumeration differed from that observed in temporal enumeration.

Conclusions:

• Articulatory suppression does impact spatial enumeration, necessitating a revision of current working memory models.
• Findings suggest that the phonological store may play a role in spatial enumeration, challenging existing theories.
• The study highlights differences in how working memory is engaged for temporal versus spatial tasks.