Description

The Interaction Anxiousness Scale (IAS-15) is a psychometric instrument developed to assess the level of anxiety individuals experience during face-to-face social interactions. Originally developed by Mark R. Leary, the scale measures a stable tendency to experience discomfort, nervousness, and apprehension when interacting with other people, particularly in unfamiliar or socially demanding situations.

Unlike measures that focus exclusively on performance anxiety, the IAS-15 evaluates general interaction anxiety, including concerns about initiating conversations, meeting new people, participating in social gatherings, and forming interpersonal relationships. Individuals with elevated interaction anxiousness often worry about being negatively evaluated, making mistakes, or failing to create a favorable impression during social encounters.

The IAS-15 is widely used in clinical psychology, personality research, social psychology, counseling, and behavioral sciences to investigate social anxiety and its impact on interpersonal functioning, psychological well-being, and quality of life.

Analysis and Use of Data

The analysis of the IAS-15 focuses on evaluating the severity of anxiety experienced during everyday social interactions. Participants respond to 15 statements describing thoughts, emotions, and behaviors associated with interpersonal communication using a 5-point Likert response scale.

The resulting scores can be used to examine relationships between interaction anxiety and various psychological constructs, including generalized anxiety, social anxiety disorder, depression, self-esteem, loneliness, emotional regulation, personality traits, attachment styles, interpersonal competence, and psychological well-being. The scale is frequently employed in both clinical and non-clinical populations to identify individuals who experience significant distress in social situations.

Psychometric evaluation typically includes the assessment of internal consistency using Cronbach’s alpha, test–retest reliability, and construct validity through exploratory or confirmatory factor analysis. Researchers may also evaluate convergent and discriminant validity by comparing IAS-15 scores with other established measures of social anxiety, social avoidance, and interpersonal functioning.

Objective

The primary objective of the IAS-15 is to provide a reliable and valid assessment of anxiety experienced during interpersonal interactions. More specifically, the scale aims to:

  • Assess the degree of anxiety experienced during everyday social interactions.
  • Identify individuals with elevated levels of interaction anxiety.
  • Evaluate emotional and cognitive reactions to interpersonal communication.
  • Support clinical assessment and psychological intervention planning.
  • Facilitate research examining the relationship between interaction anxiety, social functioning, and mental health.

Scoring

The IAS-15 consists of 15 items rated on a 5-point Likert scale, where:

  • 1 = Not at all Characteristic of Me
  • 2 = Slightly Characteristic of Me
  • 3 = Moderately Characteristic of Me
  • 4 = Very Characteristic of Me
  • 5 = Extremely Characteristic of Me

The total score is calculated by summing participants’ responses across all items. Higher scores indicate greater interaction anxiousness, reflecting increased discomfort, nervousness, and fear during interpersonal encounters. Lower scores indicate greater confidence, comfort, and ease in social interactions.

For research applications, it is recommended that the psychometric properties of the instrument be evaluated through measures of reliability, including Cronbach’s alpha, test–retest reliability, and confirmation of its factorial structure using exploratory or confirmatory factor analysis.

Applications

The Interaction Anxiousness Scale is widely used in clinical psychology, personality psychology, counseling, educational psychology, and social psychology. It has been applied in studies investigating social anxiety disorder, generalized anxiety, depression, self-esteem, loneliness, emotional regulation, attachment, interpersonal competence, communication skills, and psychological well-being.

In clinical practice, the IAS-15 assists mental health professionals in identifying individuals who experience significant anxiety during interpersonal interactions and can be used to monitor changes following cognitive-behavioral therapy, social skills training, or other psychological interventions aimed at improving social functioning.

References

Leary, M. R., & Kowalski, R. M. (1995). Social Anxiety. New York: Guilford Press.

Leary, M. R. (1983). Social Anxiousness: The Construct and Its Measurement. Journal of Personality Assessment, 47, 66–75.

Leary, M. R., & Kowalski, R. M. (1993). The Interaction Anxiousness Scale: Construct and Criterion-Related Validity. Journal of Personality Assessment, 61, 136–146.