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Brain activations associated with shifts in response criterion on a recognition test
M B Miller1, T C Handy, J Cutler
1Department of Psychology, University of Massachusetts Boston, 100 Morrissey, Boulevard, Boston, MA, USA. michael.miller@umb.edu
Summary
This fMRI study found distinct brain regions for decision-making bias versus memory retrieval. Shifting decision criteria activated the cerebellum and lateral prefrontal cortex, separate from memory processes.
Area of Science:
- Cognitive Neuroscience
- Neuroimaging
- Psychology
Background:
- Recognition tests involve both memory retrieval and decision-making processes.
- Sensitivity and response bias are independent factors influencing recognition performance.
- Understanding the neural basis of these distinct processes is crucial for cognitive models.
Purpose of the Study:
- To investigate whether neural activations for decision criterion manipulation (bias) differ anatomically from those for memory strength/retrieval manipulation (sensitivity).
- To map distinct brain regions associated with bias adjustments versus episodic memory retrieval using functional Magnetic Resonance Imaging (fMRI).
Main Methods:
- Functional Magnetic Resonance Imaging (fMRI) was employed to measure brain activity.
- Participants underwent a recognition test with independent manipulations of decision criteria (bias) and memory strength (sensitivity).
- Analysis focused on identifying distinct anatomical locations of neural activations for each manipulation.
Main Results:
- Neural activations linked to shifting decision criteria (bias) were observed in bilateral lateral cerebellum, lateral parietal lobe, and dorsolateral prefrontal cortex.
- These bias-related activations were anatomically distinct from activations associated with memory retrieval (sensitivity).
- Memory retrieval activations were located in more medial and anterior prefrontal cortex regions, consistent with prior episodic retrieval studies.
Conclusions:
- Decision-making bias and memory retrieval engage distinct neural substrates.
- The findings provide anatomical evidence differentiating neural correlates of bias and sensitivity in recognition memory.
- This research has implications for comparing memory models and understanding cognitive processes in Cognitive Neuroscience.