Impairment of conflict processing in alexithymic individuals

Alexithymia is characterized by difficulties in identifying and describing feelings and in distinguishing between feelings and bodily sensations. Several researchers have examined the impairment of executive functioning in alexithymia; however, only a few studies have been specifically concerned with conflict processing in alexithymia. Utilizing the attention network test (ANT), we investigated whether alexithymia is related to or independent of executive function, especially with respect to conflict processing. Participants included 33 subjects with high alexithymia scores on the 20-item Toronto Alexithymia Scale (TAS-20) and 30 matched subjects with low alexithymia scores. On the ANT, we found a significant difference between the two groups in conflict processing, and no significant difference in alerting and orienting dimensions. These findings suggested that subjects with high alexithymia scores have selective impairment in conflict processing.

► All participants were selected from normal college students.
► High alexithymia score group performed worse than controls in conflict processing.
► In alerting and orienting, no differences were found between the two groups.
► High alexithymia scorers had less efficient executive function.
► Our findings may facilitate the understanding of the relationship between alexithymia and conflict processing.