There is a need for short, reliable, sensitive assessment tools to measure social cognition. The Awareness of Social Inference Test (TASIT) is an ecologically valid instrument that uses videos of actors engaged in everyday conversations to assess emotion perception, the ability to detect lies, sarcasm and sincerity, and the ability to judge what others are thinking, intending, feeling, and saying. A recently developed short version of TASIT retains the structure of the original test and its clinical sensitivity. In this paper, we compare TASIT-S performance in healthy adolescents, adults, and older adults as well as the effects of country (U.S.A. and Australia), English familiarity and gender. In this study 616 Australians including 226 adolescents (13-19) and 390 adults aged 20-75 + along with 180 U.S. residents (aged 20-74) completed one, two, or three parts of TASIT-S either face to face (Australians) or on-line (US residents). Results indicated that there were minor differences in TASIT-S performance (Part 3 only) based on country of residence and no significant effects for English familiarity in adolescents (not examined in adults). There were no gender effects. Young and middle aged adults (20-59) tended to perform better than adolescents and older adults on most parts of TASIT-S. In general, TASIT-S scores decreased moderately with advancing age. In conclusion, TASIT-S is a useful screen for social cognitive impairment in English speakers that is appropriate for use from adolescence through to older age. It produces comparable scores in the U.S.A. and Australia.
The corpus callosum (CC) is vulnerable to severe traumatic brain injury (TBI). Social cognition requires integration of non-verbal and verbal information in order to understand social behaviour and may be compromised if the CC is damaged. 17 adults with severe, chronic TBI and 17 control participants underwent structural MRI and Diffusion Tensor Imaging. A region of interest analysis examined fractional anisotropy (FA) and mean diffusivity (MD) across regions of the CC. Performance on The Awareness of Social Inference Test (TASIT): part 1 (emotion recognition) and parts 2 and 3 (social inference), was examined in relation to FA and MD. Across participants, higher genu FA values were related to higher TASIT part 3 scores. Increased splenium FA was associated with better performance for TASIT parts 1-3. There was no association between DTI values and TASIT in the controls alone. In the TBI group, FA of the genu and splenium was correlated with TASIT part 3. The pattern of performance was similar when controlling for non-social cognitive ability. In conclusion, social information is complex and multi-modal requiring inter-hemispheric connection. People with TBI, regardless of focal grey matter injury, may lose social cognitive ability due to trauma related changes to the corpus callosum.
Social disinhibition difficulties are common following traumatic brain injury (TBI). However, clinically sensitive tools to objectively assess the difficulties are lacking. This study aimed to pilot a new clinical measure of social disinhibition, the social disinhibition task (SDT). Whether social disinhibition is dependent on the type of social information judgements required and whether disinhibited responses can be adjusted with additional guidance were also examined. Participants were 31 adults (25 Male) with moderate-to-severe TBI and 22 adult (17 Male) healthy control participants. Participants viewed scenes of complex social situations and were asked to describe a character in them (Part A), describe a character while inhibiting inappropriate or negative responses (Part B), and describe a character while not only inhibiting negative responses, but also providing positive responses (Part C). One-half of the items contained a faux pas requiring participants to make inferences about a character's mental state. TBI and control participants responded similarly to Part A, although control participants responded less positively than TBI participants in the faux pas items. TBI participants were significantly impaired on Part B indicating they experienced difficulties in inhibiting automatic responding. TBI participants were however able to adjust their responding in Part C so that they respond similarly to the control participants. Between group differences were not detected in reaction time. Overall, the SDT appears to be suitable to detect social inhibition difficulties in clinical settings and provides a new direction for remediation of the difficulties in individuals with TBI.
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