Shyness

• TYPE OF PSYCHOLOGY: Personality; psychopathology; social psychology

Shyness is characterized by social interaction that is inhibited by anxiety and negative self-preoccupation and is often considered a form of social anxiety disorder. Its prevalence increased by 10 percent in the 1990s. Cognitive behavioral and pharmacological treatment strategies have proven to be effective.

Introduction

Shyness is characterized by inhibited behavior and feelings of awkwardness and anxiety in social situations. It can include symptoms that are behavioral, physiological, cognitive, and emotional. It can adversely affect social or professional functioning. Among those who are predisposed toward the personality trait of shyness, it can become a part of their self-concept; it can also be induced by experiences of failure or rejection in social situations that lead to poor self-esteem among some previously without the trait.

Research supports a genetic/environmental interaction explanation for shyness. The expression of shyness in children can be modified by parents and other environmental factors, although slight tendencies to act shyly in novel situations will remain. Cognitive behavioral strategies and pharmacological interventions that focus on decreasing social withdrawal and increasing social participation have proven effective.

Possible Causes

Jerome Kagan and colleagues’ work supports shyness as being a function of both nature and nurture. Longitudinal studies that followed three- to four-year-olds into adulthood reported shyness to be one of the most persistently stable traits; studies that followed children into the eighth year reported that 75 percent of children maintained their earlier shy or sociable styles. In addition, parents and grandparents of inhibited compared with uninhibited children are more likely to report also being shy. Professor of Developmental Behavioural Genetics Thalia Eley says that 30 percent of shyness as a trait is caused by genetics. The genetic predisposition involves easily aroused sympathetic nervous systems in fetuses and infants; later in life, social and performance situations stimulate these easily aroused nervous systems, resulting in social fear and anxiety and inhibited behavior.

In 25 percent of cases, those who are predisposed do not become shy, usually through environmental factors. Parents, for instance, may moderate the expression of shyness by helping predisposed children learn to not act shyly through balancing the levels of comfort versus harshness that they extend to upset infants and by promoting social interaction. However, underlying tendencies to behave shyly in new circumstances among those who are so predisposed remain.

Shyness can be situationally induced and develop in adulthood among some who were not shy at younger ages as a result of social performance and achievement failures, feelings of unattractiveness, or other reasons that can lower self-esteem and create future evaluation apprehension and social fear.

Shyness has also been researched using brain imaging. A 2026 study into shyness, utilizing functional magnetic resonance imaging (fMRI), found evidence that those who reported stronger feelings of shyness also exhibited low levels of regional homogeneity (ReHo) in the right posterior lobe of the cerebellum. ReHo measures brain activity and synchronicity, indicating shyness may be caused by neural firing that is out of sync in that area. Previous studies had focused on other parts of the brain, such as the amygdala, prefrontal cortex, and insula. Though further research is needed, understanding how shyness functions in the various parts of the brain could lead to new treatment options.

Diagnosis

Lynne Henderson and Philip Zimbardo report that the prevalence of shyness increased in the United States from about 40 percent to 50 percent during the 1990s. Shyness has been considered a variant of social anxiety disorder. Social anxiety disorders affect 7.1 percent of adults in the United States. The manifestations for both shyness and social anxiety are similar: discomfort concerning interpersonal interaction (including conversing with and meeting others), the establishment of intimacy, participation in small groups, situations of authority, and assertiveness.

In social situations, shy individuals report experiencing behavioral symptoms, such as inhibition, nervousness, and avoidance of feared situations and eye contact; physiological symptoms, such as an increase in heartbeat, muscle tension, perspiration, and feelings of faintness, dizziness, nausea, and stomach unsettledness; cognitive symptoms, such as negative thoughts and beliefs about the self, the situation, and others; and emotional symptoms, such as low self-esteem, excessive self-consciousness, sadness, dejection, loneliness, depression, and anxiety.

Treatment

Treatments for shyness are successful and similar to those for social anxiety, according to Henderson and Zimbardo. They may include pharmacological treatments and cognitive behavioral therapy, which focuses on moving individuals from being socially withdrawn, anxious, and self-preoccupied with negative thoughts to being comfortable with social participation and interpersonal relationships. The strategies can include exposure to the feared situation simulated in treatment, in vivo, or using visualization in imaginal desensitization; flooding, or exposure to the feared situation in vivo or imaginally until anxiety is lowered (extinction); anxiety management; progressive muscle group relaxation and/or controlled breathing; social treatment; communication, coping, and assertiveness skills training; and the replacement of negative thoughts and emotions with more positive ones. Paradoxical intention, where clients learn to control their fear responses, and writing up positive self-statements called affirmations have also been found to be effective. Individual, group, and home therapy are used.

Impact

Shyness appears to be a universal phenomenon, varying from a prevalence as low as 31 percent in Israel to a high of 57 percent in Japan. Shyness can result in a pattern of avoidance of people to the extent that self-imposed isolation and painful, heart-wrenching loneliness can result. Fewer opportunities for social-skills development due to technology and other social and economic factors, such as the replacement of interactional board and other games with solitary television and computer entertainment and social interaction with computer and telephone recording devices, may play a role in exacerbating the problem of shyness, according to Zimbardo and colleagues.

Bibliography

Antony, Martin M., and Richard P. Swinson. The Shyness and Social Anxiety Workbook: Proven, Step-by-Step Techniques for Overcoming Your Fear. New Harbinger, 2008.

Butler, Gillian. Overcoming Social Anxiety and Shyness: A Self-Help Guide Using Cognitive Behavioral Techniques. Basic, 2008.

Cuncic, Arlin. "Shy vs. Introvert: Understanding the Dimensions of Introversion and Shyness." Verywell Mind, 15 Mar. 2026, www.verywellmind.com/introversion-and-shyness-explained-3024882. Accessed 20 Mar. 2026.

"Exploring the Recent Rise of Social Anxiety Disorder." Seattle Anxiety, 25 Feb. 2023, seattleanxiety.com/psychiatrist/2023/2/24/exploring-the-recent-rise-of-social-anxiety-disorder. Accessed 20 Mar. 2026.

Gillet, Catherine. The Shyness Solution. Adams Media, 2013.

Henderson, L., and Philip Zimbardo. “Shyness.” Encyclopedia of Mental Health. Ed. Howard S. Friedman. Academic, 1998.

Jones, W. H., and B. N. Carpenter. “Shyness, Social Behavior, and Relationships.” Shyness: Perspectives on Research and Treatment. Ed. W. H. Jones, J. M. Cheek, and S. R. Briggs. Plenum, 1986.

Kagan, J. “Temperament and the Reactions to Unfamiliarity.” Child Development, vol. 68, 1997, pp. 139–43.

Kagan, J., D. Arcus, and N. Snidman. “The Idea of Temperament: Where Do We Go from Here?” Nature, Nurture, and Psychology. Ed. R. Plomin and G. E. McClearn. APA, 1994.

Keating, Sarah. "The Science Behind Why Some of Us Are Shy." BBC, 5 June 2019, www.bbc.com/future/article/20190604-the-science-behind-why-some-of-us-are-shy. Accessed 20 Mar. 2026.

Li, Liang, et al. "Associations Between Trait Shyness and Cerebellar Spontaneous Neural Activity are Mediated by Behavioral Inhibition." Personality and Individual Differences, vol. 248, 2026, DOI:10.1016/j.paid.2025.113454.  Accessed 20 Mar. 2026.

Rubin, Kenneth H., and Robert J. Coplan. The Development of Shyness and Social Withdrawal. Guilford, 2010.

Schmidt, Louis A., and Jay Schulkin, eds. Extreme Fear, Shyness, and Social Phobia. Oxford UP, 2003.

Weeks, Justin W. The Wiley Blackwell Handbook of Social Anxiety Disorder. Wiley Blackwell, 2014.