What is an MRI in psychology?

Magnetic Resonance Imaging (MRI) is a brain imaging technique that uses strong magnetic fields, radio waves, and a computer to produce detailed 2D or 3D images of brain structure, which can then be analysed by a trained professional. This method allows researchers to explore how differences or changes in brain structure may be linked to changes in behaviour, and vice versa.

One strength of MRI is that it is safe and non-invasive, allowing repeated scans to be conducted without exposing participants to harmful radiation. This makes it useful for studying long-term changes in the brain. However, a limitation is that MRI only provides structural information, not data about brain activity. It is also expensive and requires participants to remain very still during the scan, which can be challenging for certain groups and may limit its accessibility in some research contexts.

In psychology, researchers use MRI to study how the brain develops from childhood to adulthood, helping them understand typical brain maturation and how it relates to behaviour and cognitive abilities. MRI is also used to show neuroplasticity, revealing how the brain physically changes in response to learning and experience.