It is relatively well established that having a traumatic brain injury is associated with subsequent deficits in emotion recognition from facial expressions (Babbage et al., 2011) and these deficits are thought to be relatively stable over time (Ietswaart, Milders, Crawford, Currie, & Scott, 2008). Changes in emotion recognition do not seem to be limited to people with moderate or severe injuries (Ietswaart et al., 2008; Kubu, 1999; Kubu et al., 1993), although there has been little research on specifically mTBI in this field. Léveillé, Guay, Blais, Scherzer, and De Beaumont (2017) after multiple concussion injuries suggested that males but not females show impaired emotion recognition. Further mood disorders, such as anxiety (Attwood et al., 2017) and depression (Dalili, Penton-Voak, Harmer, & Munafo, 2015) have been shown to impact emotion recognition. The aim of the current study is to investigate the effect of mTBI on emotion recognition in ALSPAC, whilst exploring the potential impact of factors such as sex, general cognitive ability, and mood.