About the Measure

Domains Emotional Intelligence (mixed and trait)
Key stages Key Stage 3, Key Stage 4, Key Stage 5
Subscales Difficulty describing feelings; Difficulty identifying feelings;  Externally-oriented thinking
Description One of the most commonly used measures of alexithymia. Alexithymia refers to people who have trouble identifying and describing emotions and who tend to minimise emotional experience and focus attention externally. The TAS-20 has 3 subscales: difficulty describing feelings, difficulty identifying feelings, and externally-oriented thinking.
Example I am often confused about what emotion I am feeling
Link http://www.gtaylorpsychiatry.org/tas.htm
Psychometry
Implementation

Implementation details

No. of items 20
Format Likert
Respondent Self
Scoring Standardised
Time 0
Age 12-18
Cost single purchase £35
Cost per child -

Psychometric details

UK norms No
Cronbach's α .49-.87
Test retest Mean difference of -.33 for a 5-week period, indicating a Spearman's rho= .76
Inter-rater reliability Not reported
EFA Not reported
CFA Multigroup (age) 3-factor model
SB-Chi-square(167)= [180.65 318.58]
CFI= [.85 .94]
RMSEA= [.023 .056]
SRMR= [.07 .08]
Criterion validity Not reported
Construct validity Not reported
Concurrent validity Not reported
Predictive validity Not reported
Responsiveness Not reported
Floor/Ceiling Not reported
References Säkkinen, P., Kaltiala-Heino, R., Ranta, K., Haataja, R., & Joukamaa, M. (2007). Psychometric properties of the 20-item Toronto Alexithymia Scale and prevalence of alexithymia in a Finnish adolescent population. Psychosomatics, 48(2), 154-161. doi:10.1176/appi.psy.48.2.154
Zimmermann, G., Quartier, V., Bernard, M., Salamin, V., & Maggiori, C. (2007). [The 20-item Toronto alexithymia scale: structural validity, internal consistency and prevalence of alexithymia in a Swiss adolescent sample]. LEncephale, 33(6), 941-946. doi:10.1016/j.encep.2006.12.006
Parker, J. D., Eastabrook, J. M., Keefer, K. V., & Wood, L. M. (2010). Can alexithymia be assessed in adolescents? Psychometric properties of the 20-item Toronto Alexithymia Scale in younger, middle, and older adolescents. Psychological Assessment, 22(4), 798-808. doi:10.1037/a0020256
Craparo, G., Faraci, P., & Gori, A. (2015). Psychometric properties of the 20-item Toronto Alexithymia Scale in a group of Italian younger adolescents. Psychiatry Investigation, 12(4), 500-507. doi:10.4306/pi.2015.12.4.500