Strathclyde Inventory (SI-22) Test

Understand personal growth in openness, self-acceptance, and autonomy in about 5 minutes. 22 quick items support easy progress tracking in counseling, coaching, or therapy.

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Questions: 225 minutes

Hi! My name is Freudly, i am an AI therapist, I will give you an interpretation of the test after you complete it.

08:30

October 2, 2025

October 2, 2025
Material has been updated

October 2, 2025
Material has been published

16,945 views

1,729 completions

1,467 likes

Verified by Daniel Hall

Psychologist with 25 years of experience

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How the Scales are Structured

example score

47/80

Fully Functioning Person Level (FFPL)

Measures the degree of personal potential realization, inner harmony, openness to experience, and capacity for self-regulation in line with Rogers’ fully functioning person concept.

Developing

Moderate

High

0 – 49: Developing | 50 – 64: Moderate | 65 – 80: High

A score of 47 falls in the Developing range, suggesting emerging openness and self-acceptance with some remaining constraints in adaptation and realizing personal capabilities.

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DATA-BASED USER COHORTS

Who Usually Takes This Test?

Therapy and counseling clients

44%OF USERS

People in ongoing counseling or psychotherapy take it to track changes in openness, self-acceptance, and autonomy over time.

Coaching and training participants

33%OF USERS

Participants after coaching or personal development trainings use it for a quick snapshot of growth and integration of new skills.

Person-centered practitioners

23%OF USERS

Psychologists, counselors, and coaches use it to monitor client progress and evaluate how effective their person-centered work has been.

BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.

RESULTS YOU CAN ACTUALLY USE

Scale Results
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Your scores across each test scale are translated into plain, usable insights. You won’t just get numbers — you’ll learn how your results impact your daily life, emotional state, and overall well-being.

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Interpretation

You’ll receive a structured, clinically-grounded explanation. Our AI analyzes patterns and relationships between scales to provide a coherent interpretation, without exaggerated language.

Statistical
Comparison

See how your results compare to others. Anonymized platform data is used to create a percentile scale, which identifies whether your results are typical.

Practical
Recommendations

You’ll receive clear, actionable guidance tailored to your profile. These easy-to-implement suggestions focus on coping, self-regulation, and realistic next steps.

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Insights

Get insights on behavioral and thought patterns you might not notice on your own. By uncovering subtle connections between your responses, you’ll better understand what may be driving your current results.

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Clarify, reflect, and explore your results right away. Talk through your experience, ask questions, and explore meanings in a calm, non-diagnostic dialogue.

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Used in 52+ countries

Benchmarking

See How You Compare

Once you complete the test, your results are compared with real-world data from people in your country.
Below is a preview of how scores are typically distributed across each scale.

Level of a fully functioning person (Loaffp)

Average

56.9

Normal range

45.6 — 68.2

min.

max.

Majority

This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.

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CLEAR ANSWERS TO COMMON QUESTIONS

Frequently Asked Questions

What does this questionnaire measure?

It provides a brief indicator of personality development within a person-centered framework. It focuses on growth-related qualities such as openness to experience, self-acceptance, and autonomy.

Who is this questionnaire intended for?

It is intended for use in counseling, coaching, psychological support, and post-training evaluation. It is suitable for tracking change over time rather than for diagnosing disorders.

How long does it take and how many items are included?

Completion typically takes about 5 minutes. The form includes 22 items.

Does it screen for mental health problems or pathology?

No; it is not designed to identify symptoms, disorders, or risk. It describes current progress in personal growth and adjustment.

How should results be used in practice?

Scores can be used as a snapshot of current development and as a baseline for follow-up comparisons. Interpretation should be integrated with other clinical information and observed change across sessions.

WHAT THE TEST MEASURES

About This Assessment

Strathclyde Inventory (SI-22) Test - Symptoms and Signs

existential psychology self-actualization

This brief self-report measure is designed to support a rapid appraisal of personality development within a person-centered framework. The Strathclyde Inventory (SI-22) is intended to characterize growth-oriented change rather than to screen for psychopathology.

The instrument contains 22 items and typically takes about 5 minutes to complete. Item content is commonly aligned with person-centered constructs such as openness to experience, self-acceptance, and autonomy, and may be used to track perceived change over time in counseling or related settings.

Scoring yields indices that can be used to summarize current functioning and to monitor shifts following interventions or supportive experiences. The Strathclyde Inventory (SI-22) is attributed to J. C. Nunnally and I. H. Bernstein.

Author: I. H. Bernstein, J. C. Nunnally

Literature: John, O. P., Donahue, E. M., & Kentle, R. L. The Big Five Inventory—Versions 4a and 54. University of California, Berkeley, Institute of Personality and Social Research. 1991.; DeVellis, R. F. Scale development: Theory and applications. SAGE. 2012.; Zech, E., Brison, C., Elliott, R., Rodgers, B., & Cornelius-White, J. Measuring Rogers' conception of personality development: Validation of the Strathclyde Inventory – French version. Person-Centered & Experiential Psychotherapies. 2018.

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