Why does lag affect the durability of memory-based automaticity: loss of memory strength or interference?

Area of Science:

• Cognitive Psychology
• Memory Research
• Learning Science

Background:

• The lag effect influences memory-based automaticity, with initial practice favoring short lags but delayed testing favoring long lags.
• Previous research suggests this effect may stem from either memory decay or interference.

Purpose of the Study:

• To differentiate between interference and memory decay as causes of the lag effect on the durability of memory-based automaticity.
• To investigate how practice conditions (short vs. long lag) affect long-term retention.

Main Methods:

• Participants engaged in repeated practice of alphabet subtraction under short and long lag conditions.
• Testing occurred either immediately after practice or after a 7-day delay to assess durability.

Main Results:

• Delayed testing revealed slower response times and lower retrieval accuracy for short lag items compared to long lag items.
• The observed lag effect on durability was consistent with interference rather than simple memory strength loss over time.

Conclusions:

• The durability of memory-based automaticity, particularly the lag effect, is primarily influenced by interference.
• Findings suggest a need to refine current theories of memory-based processing to better account for interference effects on long-term learning.