Genetic and Environmental Factors in Alexithymia: A Population-Based Study of 8,785 Danish Twin Pairs

Abstract

The results from this large population-based sample suggest that genetic factors have a noticeable and similar impact on all facets of alexithymia. While the results suggested a moderate influence of shared environmental factors, our results are in concordance with the general finding that environmental influences on most psychological traits are primarily of the nonshared rather than the shared type.