Dissociation and memory fragmentation: experimental effects on meta-memory but not on actual memory performance

Area of Science:

• Psychology
• Neuroscience

Background:

• Dissociation is a complex psychological phenomenon often linked to memory disturbances.
• Clinical reports suggest a connection between dissociation and fragmented memories, particularly in trauma victims.
• The objective relationship between state dissociation and memory fragmentation requires further empirical investigation.

Purpose of the Study:

• To investigate the relationship between state dissociation and memory fragmentation.
• To differentiate between actual memory performance and meta-memory (perceived memory) in relation to dissociation.
• To examine whether state dissociation impacts objective memory recall or subjective memory perception.

Main Methods:

• Selected participants based on trait dissociation scores using the Dissociative Experience Scale.
• Induced state dissociation by having participants watch an aversive film and measured it using the Peri-traumatic Dissociative Experience Scale.
• Assessed actual memory fragmentation via a sequential memory task and perceived fragmentation (meta-memory) using a visual analogue scale.

Main Results:

• Participants with higher state dissociation reported more fragmentary recollections of the film.
• No significant effect of state dissociation on objective memory fragmentation was found in the sequential memory task.
• A divergence was observed between subjective perception of memory fragmentation and objective memory performance.

Conclusions:

• The association between dissociation and memory fragmentation may primarily reside in meta-memory rather than actual memory.
• Findings challenge the direct causal link between dissociation and objective memory fragmentation.
• Highlights the importance of distinguishing between subjective experience and objective performance in memory research.