There is also inconsistency regarding studying anxiety and depressive
symptoms as a single «internalizing
domain» or as two clinically - distinct presentations.6, 7 Similar issues with how to classify
symptoms are reflected in the lack of consensus as to whether emotional problems should be conceptualized and studied in a categorical versus dimensional fashion.8 Diagnostic criteria (DSM - IV - TR) 9 are often inappropriate for young children and do not capture developmentally - salient types of impairment (e.g., disruption in family routine), which make it difficult to apply
psychiatric research methods.