in 2014, a meta-analysis of 215 study sample by researcher a.e. johnson and d voyeur in the journal "cognition and emotion" found overall female advantage in emotional recognition. other studies have also indicated greater female superiority to discriminate vocal and facial expression regardless of valence, and also being able to accurately process emotional speech. studies have also found males to be slower in making social judgements than females. structural studies with mri neuroimaging has also shown that women have bigger regional grey matter volumes in a number of regions related to social information processing including the inferior frontal cortex and bigger cortical folding in the inferior frontal cortex and parietal cortex. researchers supposed that these sex differences in social cognition predisposes to high rates of autism spectrum disorders among males which is characterized by lower social cognition. two 2015 reviews published in the journal "emotion review" also found that adult women are more emotionally expressive, but that the size of this gender difference varies with the social and emotional context. researchers distinguish three factors that predict the size of gender differences in emotional expressiveness: gender-specific norms, social role and situational constraints, and emotional intensity.