The Effectiveness of Dance Movement Therapy on Emotion Identification of Facial Expressions in Adults with Autism Spectrum Disorders: An EEG study

Autism Spectrum Disorder (ASD) is receiving growing attention as the number of diagnoses continues to rise. However, there is a lack of resources focused on investigating interventions that could improve the quality of life for individuals with ASD. People with ASD often encounter difficulties in social interactions, and their challenges in recognizing emotions further hinder their ability to understand social cues and build relationships. This emotional recognition deficit is thought to be influenced by observed brain abnormalities in the frontal lobe for people with ASD. Given these significant factors, it is crucial to explore potential interventions. The present study utilized Dance Movement Therapy (DMT) as an intervention for individuals with ASD and assessed their emotional recognition abilities, complemented by EEG recordings to explore the efficacy of DMT. A total of 12 one-hour DMT sessions were conducted with the experimental group (n=6), while the control group (n=5) received no intervention. Participants were presented with the Revised Version of the Averaged Karolinska Directed Emotional Faces (AKDEF), which included 36 images (excluding neutral images and full left and right profiles) at four intervals: pre-therapy (T1), after the 4th session (T2), after the 8th session (T3), and post-therapy (T4), while task for control group was present in two-week intervals. EEG band power for alpha and beta frequencies in the frontal lobe was recorded using the EMOTIV EPOC X at the AF4, F4, F3, and AF3 sites. Results indicated that the experimental group demonstrated a significant improvement in accuracy on emotional recognition tasks compared to the control group, although no significant differences were found between trials. In contrast, EEG signal analysis revealed significant differences between trials in both groups. A comparison of the correlation between emotional recognition tasks and EEG band power highlighted intriguing contrasts, suggesting potential insights into the learning effects. The experimental group exhibited peak performance at T2, followed by a decline at T3 and T4; while the control group showed a decrease at T2, an increase at T3, and another decrease at T4. It is proposed that the learning observed in the experimental group at T2, following four sessions of DMT, enhanced their ability to perform the emotional recognition tasks, resulting a subsequent decrease in alpha and beta power at T3 and T4, suggesting that less effort was needed during image perception and. In contrast, the control group struggled to learn, which may indicate that learning was not occurred for the controls. This relationship has not been explicitly explored in current research, and further investigations are recommended. Nonetheless, the findings indicate that DMT is effective to some extent in enhancing emotional recognition skills among individuals with ASD, suggesting its potential utility for social services to consider in their offerings. Future studies would benefit from incorporating a larger sample size or employing clinical EEG recording devices to further refine the results.