Retrieval-induced forgetting: dynamic effects between retrieval and restudy trials when practice is mixed

Area of Science:

• Cognitive Psychology
• Learning and Memory
• Educational Psychology

Background:

• Previous research indicates repeated retrieval practice, but not repeated study, leads to forgetting of related unpracticed items.
• The effect of retrieval-induced forgetting is well-documented in pure practice conditions.

Purpose of the Study:

• To investigate if retrieval-induced forgetting effects generalize to mixed practice schedules.
• To examine whether restudy practice also induces forgetting when interleaved with retrieval practice.

Main Methods:

• Two experiments were conducted using cued recall (Experiment 1) and item recognition (Experiment 2).
• Participants engaged in pure retrieval, pure study, or mixed practice (interleaved retrieval and restudy trials).
• The impact on related, unpracticed items was assessed.

Main Results:

• Consistent with prior work, pure retrieval practice induced forgetting of related unpracticed items, while pure study did not.
• In mixed practice conditions, both retrieval and restudy trials led to forgetting of related unpracticed items.
• Restudy induced forgetting only when practice was mixed, not when it was pure.

Conclusions:

• Retrieval practice induces forgetting regardless of practice mode (pure or mixed).
• Restudy practice can induce forgetting when interleaved with retrieval practice, suggesting dynamic interactions between practice types.
• Mixed practice may lead to increased retrieval processes during restudy, causing forgetting of related items.