Reading focus
Syllabus: Why Does Learned Behavior Persist—and When Does It Change?
Identify the step from differences in returning skin-conductance responses to the proposed modification of a memory. Include the linked 2018 addendum when examining how the analyzed participants were selected.
A question to consider. What evidence would make a ten-minute reminder advantage a case for memory updating rather than another way of regulating the expression of learning?
Why this reading
This influential experiment asks whether the timing of a reminder before extinction can change the later return of conditioned responding. Its contested interpretation also makes it a useful case for distinguishing an observed response from a claim about changing the underlying memory.
Before you read
Colored squares predict a mild electric shock; skin conductance indexes physiological responding. Reconsolidation is the proposed restabilization of a memory after retrieval makes it modifiable. Spontaneous recovery follows a delay; reinstatement follows renewed exposure to the aversive outcome. The 2018 addendum belongs with the original report because it clarifies how participants were included or excluded.
Read for
- Compare the reminder ten minutes before extinction, the six-hour reminder, and no-reminder conditions. Identify the observation needed to support a timing-specific advantage.
- Separate differences between conditions from significant change within one condition but not another. Examine what the follow-up sample can establish about durability.
- Trace the inference from skin conductance to fear and then to memory modification. Compare the original methods with the addendum's account of qualitative trial-by-trial exclusion decisions.
Consider afterwards
- If a physiological response does not return at one test, what further evidence would distinguish memory modification from a change in its expression?
Editorial context
The article is retained for a consequential, disputed claim, not as established evidence of memory erasure. Its 2018 addendum clarifies exclusions based on qualitative acquisition and extinction patterns. A registered replication by Chalkia and colleagues (2020) found no benefit in the critical ten-minute-reminder comparison. A separate verification report reanalyzes the original data and has its own 2021 corrigendum. The original, replication, reanalysis, and notices have distinct evidential roles. These laboratory results do not by themselves establish a clinical treatment or settle all reconsolidation research.