Maintaining a cautious state of mind during a recognition test: a large-scale fMRI study
E M Aminoff1, S Freeman2, D Clewett3
1Center for the Neural Basis of Cognition & Department of Psychology, Carnegie Mellon University, Pittsburgh, PA, USA.
Neuropsychologia
|December 16, 2014
Summary
Decision criteria significantly impact recognition memory performance. Conservative criteria, requiring more evidence for recognition, led to greater activity in lateral prefrontal and parietal cortex regions associated with successful retrieval.
Area of Science:
- Cognitive Neuroscience
- Psychology
- Neuroimaging
Background:
- Decision criterion influences recognition memory accuracy by setting the evidence threshold for identifying previously encountered items.
- Neuroimaging studies often overlook decision criterion, despite its impact on hit and correct rejection rates, alongside memory strength.
- Understanding decision criterion is crucial for accurately interpreting brain activity related to successful memory retrieval.
Purpose of the Study:
- To investigate the neural correlates of decision criterion manipulation in recognition memory using fMRI.
- To determine how varying decision criteria affect brain regions associated with successful retrieval.
- To examine if individual differences in decision criterion conservativeness explain retrieval-related brain activity beyond memory strength.
Main Methods:
- fMRI study with 95 participants performing two recognition memory tests.
- Decision criteria were directly manipulated by altering the prior occurrence probability of items.
- Behavioral data (hit rates, correct rejection rates) and neural activity were recorded.
Main Results:
- Regions in the lateral prefrontal and parietal cortex showed significantly greater activity under conservative criteria compared to liberal criteria.
- Activity in these successful retrieval regions was explained by individual differences in decision criterion conservativeness, independent of memory strength.
- This suggests cognitive control plays a key role in modulating neural responses during recognition memory.
Conclusions:
- Decision criterion is a critical factor influencing the neural basis of recognition memory.
- Cognitive control mechanisms, reflected in decision criterion setting, modulate activity in prefrontal and parietal regions during successful retrieval.
- Future neuroimaging research should incorporate decision criterion assessment to better understand memory retrieval processes.
Keywords:
Decision criterionIndividual differencesLateral parietal cortexLateral prefrontal cortexRecognition memoryfMRI
