IB Extended Essay (EE) Psychology 2026 May Solution & Worked Answer

The Effect of Selective Serotonin Reuptake Inhibitors (SSRIs) on Gray Matter Volume Restoration in the Orbitofrontal Cortex of Adults with Major Depressive Disorder

Solution Overview

This paper investigates the extent to which selective serotonin reuptake inhibitors (SSRIs) promote gray matter volume (GMV) restoration in the orbitofrontal cortex (OFC) of adults with major depressive disorder (MDD).

Using a comparative analysis of secondary neuroimaging research, the author evaluates studies employing MRI and Voxel-Based Morphometry (VBM). The findings suggest a significant correlational link between SSRI treatment and increased GMV in the OFC, while noting cultural discrepancies between Chinese and Western study results.

The exemplar is distinguished by its rigorous critical evaluation of methodological limitations, including sample generalizability, the use of outdated DSM-IV diagnostic criteria, and the impact of confounding variables in clinical settings.

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