The goal of this research is to
employ a variety of techniques, including electroencephalography (EEG), event - related potentials,
functional magnetic resonance imaging (fMRI), positron emission tomography (PET), molecular genetics, as well as stress and pharmacological manipulations, to advance the understanding of anhedonia.
For example
functional magnetic resonance imaging (fMRI), children with a history of preschool - onset depression demonstrated distinct patterns of brain activation, which were similar to those of adults with depression.34 Other research documents that DSM - IV criteria for depression do not adequately capture the disorder's course in preschool - aged children.35 Similar to the heightened awareness regarding preschool depression, evidence suggests that young children can also suffer from post-traumatic stress disorder when age - adjusted diagnostic criteria are
employed.36