Working Memory for Sequences of Temporal Durations Reveals a Volatile Single-Item Store

Area of Science:

• Cognitive psychology
• Auditory perception
• Working memory

Background:

• Working memory fidelity varies across items in a sequence.
• Recency effects are common in verbal and visuospatial working memory.
• A "focus of attention" may prioritize certain items.

Purpose of the Study:

• Investigate recency effects in auditory duration working memory.
• Examine the impact of attention and expectation on memory fidelity.
• Determine if auditory duration memory mechanisms mirror other modalities.

Main Methods:

• Participants recalled durations of tones in sequences (1-5 items).
• Memory fidelity quantified by reproduction discrepancy.
• Attentional demands introduced via pitch variation; expectation via sequence number cues.

Main Results:

• Recall precision decreased with sequence length (set-size effect).
• Better recall for first and last items (serial position effect).
• Attentional demands and expectation modulated memory for single items.

Conclusions:

• Auditory duration working memory shares mechanisms with verbal/visuospatial memory.
• The "privileged" state of single items is volatile and susceptible to interference.
• Attention and expectation significantly impact memory fidelity, especially for solitary items.