Introversion Scale [ISN-18]

Description

The Introversion Scale (ISN-18) is an assessment instrument designed to measure an individual’s tendency toward introversion. Introversion generally refers to a preference for more limited social interaction, greater need for personal space and quiet, and stronger orientation toward internal thought and reflection.

The scale aims to capture different personality characteristics related to the way individuals interact with their social environment and manage their need for social contact or solitude.

Analysis

The ISN-18 focuses on several key dimensions associated with introversion. One of these is social avoidance, referring to a preference for smaller social groups or reduced participation in large social gatherings.

A second dimension concerns internal reflection, meaning a tendency to favor introspection, contemplation, and internal processing over frequent external interaction and activity.

The scale also considers energy restoration through solitude, referring to the individual’s tendency to recover energy by spending time alone rather than through continuous social engagement.

Finally, it examines social behavioral inhibition, that is, the degree to which the individual prefers to maintain a lower social profile and limit exposure in highly social situations.

Purpose

The primary purpose of the ISN-18 is to provide a quantitative estimate of an individual’s tendency toward introversion. The scale may also contribute to a better understanding of how a person relates to the social environment, manages social demands, and prefers to process personal experiences.

The results may be useful in counseling or research contexts where individual differences in personality and social functioning are of interest.

Scoring

Scoring is based on participants’ responses to the individual items of the scale. The total score is derived from the combined responses, with higher scores indicating higher levels of introversion.

The provided material also refers to the possibility of classifying scores into categories such as mild, moderate, and pronounced introversion. However, no specific numerical cut-off values are provided for these categories.

References

Costa, P. T., & McCrae, R. R. (1992). Revised NEO Personality Inventory (NEO-PI-R) and NEO Five-Factor Inventory (NEO-FFI) Professional Manual. Psychological Assessment Resources.

Eysenck, H. J., & Eysenck, S. B. G. (1975). Manual of the Eysenck Personality Questionnaire. Educational and Industrial Testing Service.

McCrae, R. R., & John, O. P. (1992). An introduction to the Five-Factor Model and its applications. Journal of Personality, 60(2), 175–215.