Final answer:
Interpersonal learning is the feature of group therapy that helps individuals who share a psychological disorder observe that others feel anguish and suffering as well.
Step-by-step explanation:
The feature of group therapy that helps individuals who share a psychological disorder observe that others feel anguish and suffering as well is interpersonal learning.
In group therapy, individuals have the opportunity to interact with others who are going through similar struggles. By hearing the experiences and emotions of others, individuals can gain a deeper understanding of their own feelings and realize that they are not alone in their suffering.
For example, if a person with social anxiety disorder attends a group therapy session and hears the stories of other group members who also struggle with social situations and feel anxiety, they may feel a sense of relief and validation knowing that they are not the only one experiencing these feelings.