Why the brain’s ability to picture images may influence decision making

The capacity to visualize images in one's mind can significantly impact decision-making, according to recent research. Individuals possess varying levels of this ability, ranging from those with aphantasia, lacking any mental imagery, to hyperphantasia, characterized by the ability to generate highly realistic mental images. Most people fall somewhere in between.

One theory suggests a connection between this mental imagery ability and the size and cortical excitability of the visual cortex, the brain region responsible for processing visual information. Stimulating this area with electricity can alter a person's ability to visualize, indicating a causal relationship. Other factors, such as head injuries or the use of psychedelic drugs, may also influence these capabilities.

Aphantasia, the inability to visualize images, appears to run in families, suggesting a possible genetic component. However, the exact reasons behind individual differences remain largely unexplained. Researchers have developed advanced methods to assess mental imagery, including tests based on binocular rivalry and physiological responses like pupil size and skin conductance.

Interestingly, the ability to picture things in one's mind can affect various aspects of life. While aphantasia doesn't necessarily hinder creativity, it may impact decision-making processes by altering perceptions of risk. For instance, individuals with strong mental imagery may experience higher anxiety or post-traumatic stress disorder after distressing events.

To determine one's mental imagery capabilities, they can take the Vividness of Visual Imagery Questionnaire, although it remains unclear whether such assessments accurately capture the full range of individual differences.