In the realm of neurodevelopmental differences, understanding the intricate relationship between alexithymia and autism spectrum disorder (ASD) has become increasingly important for both individuals and mental health professionals. While autism is more widely recognized, alexithymia—a condition characterized by difficulties in identifying, understanding, and expressing emotions—affects a significant portion of the population and shows remarkably high co-occurrence rates with autism.
What is Alexithymia? Understanding the Basics
Alexithymia, also called emotional blindness, is a neuropsychological phenomenon characterized by significant challenges in recognizing, sourcing, and describing one’s emotions. The term itself comes from Greek, literally meaning “without words for emotions”—a fitting description for those who struggle to put their emotional experiences into words.
Alexithymia occurs in approximately 10% of the general population, making it a relatively common condition that often goes unrecognized. However, it is present in 50% to 85% of individuals with autism spectrum disorder (ASD), highlighting a profound connection that researchers are still working to fully understand.
The Three Core Components of Alexithymia
Alexithymia is characterized by three main features, as measured by the Toronto Alexithymia Scale (TAS-20), a 20-item self-report questionnaire that can be used to identify issues relating to alexithymia such as difficulty identifying and describing feelings and externally oriented thinking:
- Difficulty Identifying Feelings (DIF): Autistic individuals often encounter obstacles when it comes to identifying and articulating emotions, a condition known as alexithymia. This trait is characterized by challenges in recognizing and describing one’s own feelings.
- Difficulty Describing Feelings (DDF): Even when emotions are felt, individuals with alexithymia struggle to find the appropriate words to communicate their emotional state to others.
- Externally Oriented Thinking (EOT): This involves a cognitive style that focuses attention on external events rather than internal emotional experiences.
The Prevalence of Alexithymia: Key Statistics
Understanding the scope of alexithymia requires examining its prevalence across different populations:
General Population Statistics
In a comprehensive study of the Finnish population, the prevalence of alexithymia was 13%. Men were alexithymic almost twice (17%) as often as women (10%). Previous studies have shown that the prevalence of alexithymia ranges from 7.3 to 29.9% in adolescents, from 9 to 17% in males and 5 to 10% in females of working age, over 20% in the older age groups, and even over 30% in the oldest populations.
Alexithymia in Autism: Striking Co-occurrence Rates
The relationship between alexithymia and autism reveals some of the most compelling statistics in this field:
- Current estimates of the prevalence of alexithymia in ASD vary, with this paper finding estimates between 33.3% and 63%
- A recent study finding a prevalence rate of 55% in autistic adolescents
- Many autistic people (40–65% or more) have alexithymia, a condition characterized by the inability to identify and describe emotions in the self
Clinical Populations
A high prevalence of alexithymia has been observed among populations with psychosomatic disorders and autism spectrum disorders (40–60%), eating disorders (24–77%), addictive disorders (30–50%), obsessive-compulsive disorder (11–36%), and mental disorders such as anxiety (13–58%).
The Complex Relationship Between Alexithymia and Autism
The Alexithymia Hypothesis
New research suggests that, rather than representing a core feature of autism spectrum disorder (ASD), emotional processing difficulties reflect co-occurring alexithymia. This groundbreaking perspective, known as the “alexithymia hypothesis,” suggests that the emotion processing difficulties seen in ASD stem from co-occurring alexithymia, rather than representing a core feature.
Impact on Mental Health
The co-occurrence of alexithymia and autism has significant implications for mental health:
- At least 20–50% of autistic individuals experience co-occurring anxiety and/or depression – far higher rates than those observed in the general population
- With research suggesting that increased rates of alexithymia in autism are associated with heightened anxiety and emotional difficulties compared to those with ASD only, it seems likely that the nearly 50% of autistic individuals with this co-occurring individuals may have unique needs that require specific interventions
Neurobiological Connections
A meta-analysis of neuroimaging studies suggests that alexithymia may be associated with reduced activation in a number of brain areas associated with emotion processing, specifically the amygdala, mirror neuron system related brain regions, the dorsomedial prefrontal cortex, and the right insula and precuneus. Although more research is needed on the potential links to alexithymia in this population, autism is known to be associated with atypical neural connectivity, including in the amygdala and insula. Consequently, it has been proposed that both autism and alexithymia may both be associated with a genetic vulnerability to atypical brain connectivity.
Signs and Symptoms of Alexithymia in Autistic Individuals
Emotional Recognition Challenges
The ability to label and differentiate emotions, a fundamental aspect of emotional intelligence, can be impaired in those with Autism Spectrum Disorder (ASD). This difficulty can hinder social interactions and self-awareness, contributing to emotional dysregulation and communication barriers.
Social and Communication Difficulties
People with autism and alexithymia find it difficult to regulate emotions because of the difficulty in identifying them. In turn, making it difficult to attend to the semantic representation of those emotions because they can’t identify what the emotional trigger is and how to deal with the resulting emotions when it occurs. As discussed, a person with alexithymia has difficulty with social interaction and social relationships, understanding the intentions and attitudes of others, difficulties with facial expression recognition, and recognizing emotional tones of speech, body movement/expression, and making decisions that take into account the point of view of others.
Physical Manifestations
Clients with alexithymia have difficulty understanding, processing, recognizing and describing emotions. During times of increased stress, worry and conflict, people impacted by alexithymia frequently experience an increase in psychosomatic-based symptoms.
Assessment and Diagnosis
The Toronto Alexithymia Scale (TAS-20)
The Toronto Alexithymia Scale (TAS-20) is a 20-item, self-administered questionnaire that measures difficulty in identifying and describing emotions, which is a big part of alexithymia. The most popular instrument to assess alexithymia is the Toronto Alexithymia Scale (TAS-20).
Scoring and Interpretation
Scores range from 20 to 100, with the higher scores indicating greater levels of alexithymia. Subscale scores can provide insight into specific areas of emotional difficulty. The subscale with the higher score indicates the area where the individual experiences the greatest challenge. However, the total score is considered the most reliable estimate of alexithymia.
- No Alexithymia: ≤51
- Possible Alexithymia: 52-60
- Alexithymia: ≥61
Challenges in Assessment
Another limitation is the reliance on self-reported data to assess alexithymia. Critics argue that individuals high in alexithymia may lack the self-awareness necessary to accurately complete a questionnaire measuring their emotional difficulties.
Treatment and Intervention Approaches
Cognitive Behavioral Therapy (CBT)
In this review, cognitive behavioral therapy was most common, indicated in 67% of the 18 studies. Of these 21 arms, 14 arms (67%) investigated the effect of cognitive behavioral therapy on alexithymia, including acceptance and commitment therapy (7 arms), behavioral activation therapy (2 arms), cognitive behavioral therapy (CBT, 1 arm), schema therapy (1 arm), compassion-focused therapy (1 arm), group cognitive therapy (1 arm).
Cognitive-Behavioral Therapy (CBT) is a common approach used to address emotion regulation deficits in individuals with ASD. The focus of CBT is to help individuals understand their thoughts and feelings in order to react more positively to emotional stimuli.
Emotion Recognition Training
Emotion recognition training is included in current guidance from the UK National Institute for Health and Care Excellence on the adaptation of CBT for autism. A key direction for future research is, therefore, to assess whether incorporating techniques specifically targeting emotional awareness could improve therapeutic outcomes for autistic people.
Music-Based Interventions
This pilot study aimed to develop a music-based intervention to improve facial and vocal emotion recognition (ER) and Alexithymia in adolescents with ASD. Music-based interventions may enhance ER in adolescents with ASD and Alexithymia. This paper contributes to work on possible interventions to support and extend emotion recognition skills in adolescents with ASD, capitalising on music’s emotional component.
Mindfulness-Based Approaches
Both interventions reduced emotion processing difficulties on the Toronto Alexithymia Scale (TAS-20). Similarly, both interventions improved interoceptive awareness immediately after daily practice and after the intervention period. Besides, mindfulness-based interventions have been proposed as suitable tools to reduce alexithymia.
Tailored Interventions for Autism
If they do, they may need a different approach to therapy. People with alexithymia may benefit from targeted therapies such as training in identifying and communicating feelings, or mindfulness exercises.
Through these interventions, individuals with alexithymia can learn effective communication strategies, such as active listening and non-verbal communication skills. They can also practice recognizing and interpreting facial expressions, tone of voice, and other non-verbal cues that convey emotions. By enhancing their communication and social skills, individuals with alexithymia can improve their ability to navigate social interactions and build meaningful relationships. It is important to tailor these interventions to the individual’s specific needs and strengths, as each person with alexithymia may have different communication and social skill challenges.
Treatment Effectiveness and Outcomes
Research Evidence
In 18 studies, 17 therapies demonstrated effectiveness in improving alexithymia, illustrating a showcase of treatments from each trial with different effect sizes (within-intervention group, ranging from 0.41 to 13.25). The results indicated that most psychological interventions significantly decreased TAS-20, illustrating a showcase of treatments from each trial with different effect sizes (within-intervention group, ranging from 0.41 to 13.25).
Specialized Programs
Participants’ emotional self-awareness and ability to describe and differentiate emotions were significantly improved immediately after treatment, and 2-months later. This suggests the benefits were maintained over time. As hypothesized, effect sizes for the TAS and LEAS were quite large at posttest, and medium-to-large 2-months later. Furthermore, 62% of participants reduced the categorical severity of their alexithymia, with 6 participants changing to “low” (normal) alexithymia at post-test, of which five remained in that category 2-months after treatment ended.
Practical Strategies for Individuals and Families
For Individuals with Alexithymia and Autism
- Emotional Awareness Training: The intervention was comprised of eight sessions involving psycho-educational lessons and skill-building exercises to accomplish the following goals: understand the benefits of emotional awareness; enhance emotional vocabulary; improve accuracy for describing personal emotions; acknowledge and differentiate multiple emotions; increase awareness for emotional responses, including changes in physical sensations; and distinguish emotions from thoughts, actions and physical sensations.
- Visual Learning Tools: Here are a few tips or ideas to teach your child emotional recognition. Use visual images with emotions to teach your child to recognize emotional facial expressions. Teach your child the different types of emotions through images and practice mimicking those expressions with body language.
- Mindfulness Practices: At the core of CBT to teach emotional regulation is mindfulness. Mindfulness teaches people to both identify their emotions, and to explore aspects of emotions through their bodies. For individuals with alexithymia, there are techniques set in place that will help them effectively recognize, cope with, and coherently express emotions.
Professional Support
A multidisciplinary approach involving speech therapists, occupational therapists, and psychologists can provide comprehensive support in this area. Seeking support from mental health professionals familiar with alexithymia and autism can provide valuable coping strategies and interventions tailored to individual needs.
Future Directions and Research
Treatment Development
Autistic individuals with alexithymia could therefore represent a specific subgroup of autism who may benefit from tailored interventions. Further high-quality RCTs with larger sample sizes and more consistent methodologies are needed, and corrective findings from such studies should be applied to produce more robust evidence-based psychological interventions for treating alexithymia.
Clinical Implications
This review highlights that alexithymia is common, rather than universal, in ASD, supporting a growing body of evidence that co-occurring autism and alexithymia represents a specific subgroup in the ASD population that may have specific clinical needs.
Professional Training Needs
Unfortunately, many mental health professionals lack the necessary training and expertise to accurately identify and effectively treat the unique and complex symptoms of alexithymia. A strong contributor to this predicament is the lack of training and educational programs that offer workshops and coursework dedicated to this important and complex topic. Professionals are strongly encouraged to seek out additional training and consult with experts to better understand the implications of alexithymia within mental health and substance use treatment settings. Academic-based institutions and continuing education training programs are encouraged to offer curriculum and workshops pertaining to the mental health implications of alexithymia.
Conclusion: The Importance of Understanding Alexithymia in Autism
The relationship between alexithymia and autism represents one of the most significant developments in our understanding of neurodivergent emotional experiences. With about 1 in 31 (3.2%) children aged 8 years has been identified with ASD according to estimates from CDC’s ADDM Network, and with alexithymia affecting up to 65% of autistic individuals, the intersection of these conditions affects millions of people worldwide.
Understanding alexithymia’s role in autism challenges long-held assumptions about emotional processing in neurodivergent individuals. Rather than viewing emotional difficulties as an inherent part of autism, the alexithymia hypothesis suggests these challenges may be more accurately understood as a separate, treatable condition that frequently co-occurs with autism.
This perspective offers hope for more targeted and effective interventions. Overall, our findings lend support to the suggestion that, as progress is made in developing and modifying interventions for autistic people, the potentially primary role of emotional awareness must be considered. The reported findings have wider implications for informing early intervention strategies to improve mental health outcomes in autism. This has notable implications for intervention, indicating that psychological therapies targeting emotional awareness may improve later outcomes for some individuals.
As we continue to advance our understanding of alexithymia and its relationship with autism, it becomes increasingly clear that personalized, evidence-based approaches to intervention hold the greatest promise for improving outcomes for autistic individuals who experience emotional processing difficulties.
References
- Huggins, C. F., Donnan, G., Cameron, I. M., & Williams, J. H. (2021). Investigating alexithymia in autism: A systematic review and meta-analysis. European Psychiatry, 55, 80-89. https://pmc.ncbi.nlm.nih.gov/articles/PMC6331035/
- Cook, R., Brewer, R., Shah, P., & Bird, G. (2013). Alexithymia, not autism, predicts poor recognition of emotional facial expressions. Psychological Science, 24(5), 723-732. https://www.cambridge.org/core/journals/european-psychiatry/article/investigating-alexithymia-in-autism-a-systematic-review-and-metaanalysis/06F8AA96D03679353022A52E6ACE2F50
- Preece, D. A., Mehta, A., Gross, J. J., Watson, B., Silves, V., & Becerra, R. (2023). Alexithymia in autism spectrum disorder. Australian Psychologist, 58(2), 131-137. https://www.tandfonline.com/doi/full/10.1080/00050067.2023.2174409
- CDC. (2025). Data and Statistics on Autism Spectrum Disorder. Centers for Disease Control and Prevention. https://www.cdc.gov/autism/data-research/index.html
- Milosavljevic, B., Carter Leno, V., Simonoff, E., Baird, G., Pickles, A., Jones, C. R., … & Happé, F. (2022). Alexithymia in autism: cross-sectional and longitudinal associations with social-communication difficulties, anxiety and depression symptoms. Psychological Medicine, 52(9), 1751-1760. https://pmc.ncbi.nlm.nih.gov/articles/PMC9226426/
