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Depersonalization-Derealization Test

Research Dataset

Deenz Depersonalization-Derealization Scale (DDDS)

Normative and Psychometric Statistics
DEVELOPING N=98 α=0.934 16Countries
Abstract

Deenz Depersonalization-Derealization Scale (DDDS) normative dataset currently contains 98 participant records collected between Jun 11, 2026 and Jul 12, 2026 .

This psychometric dataset currently includes 98 anonymous participant responses collected through voluntary participation. The observed mean score was 48.76 with a standard deviation of 21.91, indicating moderate score variability within the sampled population. Internal consistency reliability analysis demonstrated excellent reliability (Cronbach alpha = 0.934). Observed skewness (-0.03) and kurtosis (0.11) were examined as indicators of distribution quality. The score distribution appeared reasonably balanced and did not suggest substantial departures from normality.

98
Participants
16
Countries
20
Scale Items
0.934
Reliability
Table 1
Dataset Overview
Assessment Deenz Depersonalization-Derealization Scale (DDDS)
Research Status Developing Dataset
Dataset Maturity 55 /100 — DEVELOPING
Participants 98
Countries Represented 16
Items 20
Dimensions 5
Data Collection Period Jun 11, 2026 – Jul 12, 2026
Reliability α = 0.934
Note. The current Deenz Depersonalization-Derealization Scale (DDDS) dataset contains 98 participant records collected from 16 countries. Dataset maturity reflects sample size, geographic diversity, and internal consistency reliability.
Table 2
Descriptive Statistics
Statistic Value
Mean Score 48.76%
Median Score 48
Standard Deviation 21.91
Variance 480.17
Standard Error 2.21
95% CI Lower 44.42
95% CI Upper 53.09
Minimum Score 0%
Maximum Score 95%
Observed Range 95
Note. M = 48.76, SD = 21.91, Median = 48. The 95% confidence interval ranged from 44.42 to 53.09.
Table 3
Sample Characteristics
Variable Summary
Participants N = 98
Countries 16
Age Information Available
Gender Information Available
Note. Demographic information was collected voluntarily. Participant counts may vary across demographic categories when information was not reported.
Figure 1
Global Participation
Note. Participants were represented across 16 countries. The largest contribution originated from DE (23.5% of available geographic records).
Table 4
Percentile Norms
Percentile Score Interpretation
10th 18% Very Low
25th 38% Below Average
50th 48% Average
75th 63% Above Average
90th 73% Elevated
Note. Percentile values provide preliminary normative benchmarks derived from the current Deenz Depersonalization-Derealization Scale (DDDS) sample.
Figure 2
Score Distribution
Note. Observed scores ranged from 0% to 95% (M = 48.76, SD = 21.91). Distribution characteristics included skewness (-0.03) and kurtosis (0.11). Distribution indices suggested no substantial departures from normality.
Table 5
Reliability Analysis
Metric Value
Cronbach Alpha 0.934
Reliability Classification Excellent
Participants 98
Items 20
Standard Error 2.21
Note. Internal consistency was estimated using Cronbach alpha. Reliability estimates are based on the current normative dataset and may change as additional responses are collected.
Item–Total Correlations
Insufficient Sample Size

Item–total correlations are not currently reported because the assessment has fewer than 100 participant responses. Psychometric item analysis requires a larger sample to produce stable and interpretable estimates.

Current Participants: 98
Minimum Recommended: 100
Table 7
Dimension Norms
Dimension Mean SD N
Emotional Detachment (Depersonalization) 59.22% 24.62 98
Altered Self-Perception (Depersonalization) 58.82% 29.61 98
Perceptual Changes (Derealization) 50.83% 28.33 98
Functional Impairment 42% 24.32 98
Spatial Distortions (Derealization) 37.08% 28.57 98
Note. Dimension statistics summarize normative performance across the major constructs measured by Deenz Depersonalization-Derealization Scale (DDDS).
Figure 5
Dimension Profile
Note. The highest observed dimension was Emotional Detachment (Depersonalization) (59.2%), whereas the lowest observed dimension was Spatial Distortions (Derealization) (37.1%). The observed difference between dimensions was 22.1 percentage points. Substantial variation was observed between dimensions.
Table 8
Dataset Growth Summary
Metric Value
Current Participants 98
Countries 16
Collection Start Jun 11, 2026
Collection End Jul 12, 2026
Months Recorded 2
Note. Growth statistics summarize cumulative participation throughout the observed data collection period.
Normative Data Notice

A total of 98 participant responses were available for this assessment. Dimension-level norms were calculated using 98 valid response records. Approximately 0 response record(s) were excluded from dimension-level normative calculations due to incomplete response patterns.

Limitations

Normative statistics are derived from voluntary participation and may not represent all populations. Reliability estimates, percentile norms, and dimension statistics should be interpreted in the context of the current sample and may change as additional responses are collected.

Ethical Statement

All records included in this dataset were collected anonymously. No personally identifying information is stored. Data are intended for educational, psychometric, and research purposes.

Recommended Citation

Deenz Depersonalization-Derealization Scale (DDDS). Research Dataset. Retrieved from https://drdeenz.com/depersonalization-derealization-test/statistics/

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