Nuller Depersonalization Scale Test

In about 3 minutes, it helps clarify how strongly someone feels detached from self or reality. A 16 item clinician interview supports objective scoring and helps guide treatment and track change.

Start Online Test

Questions: 163 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

22683 views

2351 completion

1790 likes

Scale Explorer

How the Scales are Structured

example score

15/16

Pervasiveness (P)

Measures how many interview items show depersonalization/derealization-related disturbances, reflecting how widespread the experiences are across domains.

Limited

Moderate

Subtotal/Total

0 – 5: Limited | 6 – 12: Moderate | 13 – 16: Subtotal/Total

A score of 15 falls in the Subtotal/Total range, indicating disturbances were noted on nearly all items and the experiences are widespread.

example score

19/37

Depersonalization Severity (DS)

Measures the overall severity of depersonalization and derealization experiences based on the total interview-derived score.

Low

Moderate

High

0 – 12: Low | 13 – 24: Moderate | 25 – 37: High

A score of 19 falls in the Moderate range, suggesting a noticeable but not maximal burden of depersonalization-related experiences during the interview.

Start Online Test

just completed the test

DATA-BASED USER COHORTS

Who Usually Takes This Test?

Patients with dissociative symptoms

46%OF USERS

People describing feeling unreal, detached from their body, or as if the world is dreamlike are assessed to gauge symptom severity.

Complex anxiety or trauma cases

34%OF USERS

Individuals with panic, chronic anxiety, PTSD, or high stress who report numbness or disconnection are evaluated to clarify what’s driving their distress.

Mood or psychotic spectrum evaluation

20%OF USERS

Patients being assessed for depression, bipolar disorder, or psychotic symptoms may be interviewed to distinguish depersonalization from related experiences.

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

RESULTS YOU CAN ACTUALLY USE

What You’ll See After You Finish the Test

Scale Results
— Explained Clearly

Your scores across each test scale, translated into plain, usable insights. Not just numbers, but what they actually mean for your daily life, emotional state, and overall well-being.

AI-Powered
Interpretation

A structured, clinically grounded explanation. Our AI analyzes patterns and relationships between scales to provide a coherent interpretation — without alarmist language.

Statistical
Comparison

See how you compare to others. Your scores are placed in a statistical context, showing percentiles and trends based on anonymized platform data to help you understand what`s typical.

Practical
Recommendations

Actionable guidance tailored to your profile. Receive clear, realistic suggestions you can apply immediately — focused on coping, self-regulation, and realistic next steps.

AI-Detected
Insights

Key patterns you might not notice on your own. Surfacing subtle connections in your responses that help you better understand what may be driving your current results.

Discuss with
an AI Psychologist

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

Start Online Test

Used in 52+ countries

Benchmarking

See How You Compare

Once you finish the test, your results will be compared with real-world data from people in your country.
Below is a preview of the benchmarks we use to place your score in context.

Massiveness (M)

Average

9.2

Normal range

6.8 — 11.6

min.

max.

majority

This curve shows how scores are typically distributed.
Once you complete the test, your result will appear here so you can see where you land.

The Burden of Depersonalization (TBoD)

Average

27.1

Normal range

21.7 — 32.6

min.

max.

majority

This curve shows how scores are typically distributed.
Once you complete the test, your result will appear here so you can see where you land.

Start Online Test

Featured On

Rated 4.8/5 by Our Customers

“Freudly really helped me discover parts of my personality I hadn’t noticed before. It strengthened the areas where I needed to grow and made me feel more grounded and confident in the parts that already worked well.”

— Emma C., US

“I wanted to understand how serious my ADHD is, and now I finally do. I also realized I need to work on my self-esteem. It has been low for a long time, and that makes daily life harder than it should be.”

— Mateo R., CA

“Reading each question felt like someone really understood me. Even though I’ve already dealt with much of this, reflecting still helped me learn something new about myself.”

— Caroline F., US

“The process is simple. The test covers everything you need, and you’ll get a clear breakdown of your results. For just a few dollars, it’s a great value.”

— Klara N., CZ

“I kept thinking there might be a small chance, but now I know for sure. The questions were easy to understand, and the whole process was straightforward.”

— Bruno M., BR

“I really enjoyed this experience. I learned a lot, and it helped me make sense of my thoughts and the feeling I’ve had for a long time that I may have grown up with undiagnosed ADHD.”

— Alice B., FR

“Great platform — the insights were genuinely meaningful!”

— Daniel W., DE

“Everything was easy to follow. The tools you get at the end are genuinely helpful for self-growth, and the price is very reasonable. I really appreciate that.”

— Sofia M., ES

“Surprisingly accurate — honestly didn’t expect it to nail things so well.”

— Adir B., IL

“There are lots of different tests to pick from, and the price is surprisingly low for how much insight you get.”

— Olivia W., CA

“I was pleasantly surprised when I read the results. It was as if someone had sorted out my messy thoughts and given me useful tips to help me speak with more confidence.”

— Grace O., IE

“It was really solid, very detailed, and it actually helped me make sense of a lot of things.”

— Carla T., TT

“I was really impressed with the report. It was clear, thoughtful, and it reflected things I’ve been noticing about myself.”

— Jade H., US

“The questions made me think deeply and helped me become more self-aware.”

— Brooke S., US

“Reading through most of the questions made me feel understood. Although I’ve already worked through some of these issues, the questions still gave me useful insights and helped me learn more about myself.”

— Ryan M., US

“I usually take one or two tests each month, and this has become a good way for me to see how I’m doing.”

— Lucas W., US

“Most of the time, my results are in the 90 to 98th percentile compared to others. It really makes me feel like there’s something unique about me.”

— Ethan C., US

“I tried out some of the AI’s suggestions, and to be honest, they worked much better than I thought they would. Maybe this thing really is smarter than me.”

— Reece D., AU

Trusted by 22k+ Users Worldwide

CLEAR ANSWERS TO COMMON QUESTIONS

Frequently Asked Questions

Any questions left?

What does this scale measure?

It measures the severity of depersonalization and derealization symptoms. It focuses on experiences of detachment from self, body, emotions, or the surrounding world.

How is the assessment administered?

It is administered as a brief clinician-led interview. Responses are based on follow-up questions to clarify the presence and intensity of symptoms.

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

Administration typically takes about 3 minutes. It includes 16 questions.

Who is this assessment intended for?

It is intended for use in clinical settings when depersonalization or derealization is suspected. It may be used across a range of mental health conditions.

How are the results used?

Results provide a structured estimate of symptom severity at the time of assessment. They can support clinical formulation and tracking changes over time.

WHAT THE TEST MEASURES

About This Assessment

Nuller Depersonalization Scale Test

depersonalization psychopathology

Symptoms of detachment from self or surroundings can be clinically relevant across a range of psychiatric presentations. The Nuller Depersonalization Scale is used to screen and characterize the severity of depersonalization and derealization experiences in a time-efficient manner. It contains 16 items and typically requires about 3 minutes to complete.

Administration is generally clinician-directed (e.g., interview-based) to support clarification of subjective experiences and consistent rating. The Nuller Depersonalization Scale may be used to document baseline symptom burden, support differential clinical formulation, and monitor change over time; it should be interpreted in the context of the broader diagnostic assessment. Authors: D. Simeon; J. R. T. Davidson.

Author: D. Simeon, J. R. T. Davidson

Literature: Simeon, D., & Abugel, J. Feeling unreal: Depersonalization disorder and the loss of the self. Oxford University Press. 2006.

Test Question Form