Deenz Depersonalization-Derealization Scale (DDDS)
normative dataset currently contains
243
participant records collected between
Jun 11, 2026
and
Oct 13, 2026
.
This psychometric dataset currently includes 243 anonymous participant responses collected through voluntary participation. The observed mean score was 47.9 with a standard deviation of 21.17, indicating moderate score variability within the sampled population. Internal consistency reliability analysis demonstrated excellent reliability (Cronbach alpha = 0.925). Observed skewness (-0.1) and kurtosis (-0.32) were examined as indicators of distribution quality. The score distribution appeared reasonably balanced and did not suggest substantial departures from normality.
Note.
The current Deenz Depersonalization-Derealization Scale (DDDS) dataset contains 243 participant records collected from 31 countries. Dataset maturity reflects sample size, geographic diversity, and internal consistency reliability.
Table 2
Descriptive Statistics
Statistic
Value
Mean Score
47.9%
Median Score
48
Standard Deviation
21.17
Variance
448.36
Standard Error
1.36
95% CI Lower
45.23
95% CI Upper
50.56
Minimum Score
0%
Maximum Score
95%
Observed Range
95
Note.
M = 47.9, SD = 21.17, Median = 48. The 95% confidence interval ranged from 45.23 to 50.56.
Table 3
Sample Characteristics
Variable
Summary
Participants
N =
243
Countries
31
Age Information
Available
Gender Information
Available
Note.
Demographic information was collected voluntarily. Participant counts may vary across demographic categories when information was not reported.
Age Distribution
Age Group
Participants
18-24
73
under18
46
25-34
32
35-44
17
prefer_not
13
45-54
12
55plus
5
Gender Distribution
Gender
Participants
Female
106
Male
71
Prefer_not
21
Figure 1
Global Participation
Note.
Participants were represented across 31 countries. The largest contribution originated from DE (24.7% of available geographic records).
Country
Participants
Percent
DE
60
24.7%
BR
43
17.7%
US
41
16.9%
UA
11
4.5%
RU
11
4.5%
FR
9
3.7%
PT
8
3.3%
CA
7
2.9%
ES
6
2.5%
CN
5
2.1%
NL
5
2.1%
AT
4
1.6%
KZ
3
1.2%
MX
3
1.2%
GE
3
1.2%
GB
3
1.2%
AR
2
0.8%
CZ
2
0.8%
NZ
2
0.8%
PR
2
0.8%
LV
2
0.8%
PL
2
0.8%
IT
1
0.4%
MD
1
0.4%
RO
1
0.4%
FI
1
0.4%
T1
1
0.4%
VN
1
0.4%
AU
1
0.4%
RE
1
0.4%
NO
1
0.4%
Table 4
Percentile Norms
Percentile
Score
Interpretation
10th
18%
Very Low
25th
36%
Below Average
50th
48%
Average
75th
63%
Above Average
90th
74%
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 = 47.9, SD = 21.17). Distribution characteristics included skewness (-0.1) and kurtosis (-0.32).
Distribution indices suggested no substantial departures from normality.
Table 5
Reliability Analysis
Metric
Value
Cronbach Alpha
0.925
Reliability Classification
Excellent
Participants
243
Items
20
Standard Error
1.36
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
Item Analysis Interpretation
Item–total correlations were generally strong across the assessment, indicating that most items contribute effectively to the measurement of the underlying construct.
The analysis identified1
itemthat may benefit from future review.
Items Recommended for Future Review
Q20
(r = -0.03)
These experiences reduce my overall quality of life.
The lowest item–total correlation was observed for Q20 ("These experiences reduce my overall quality of life."; r = -0.03), indicating comparatively weaker alignment with the overall construct.
Table 7
Dimension Norms
Dimension
Mean
SD
N
Emotional Detachment (Depersonalization)
57.87%
24.48
243
Altered Self-Perception (Depersonalization)
55.11%
29.57
243
Perceptual Changes (Derealization)
49.51%
28.43
243
Functional Impairment
41.58%
23.19
243
Spatial Distortions (Derealization)
37.09%
28.51
243
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) (57.9%), whereas the lowest observed dimension was Spatial Distortions (Derealization) (37.1%). The observed difference between dimensions was 20.8 percentage points. Substantial variation was observed between dimensions.
Table 8
Dataset Growth Summary
Metric
Value
Current Participants
243
Countries
31
Collection Start
Jun 11, 2026
Collection End
Oct 13, 2026
Months Recorded
5
Note.
Growth statistics summarize cumulative participation throughout the observed data collection period.
Normative Data Notice
A total of
243
participant responses were available for this assessment.
Dimension-level norms were calculated using
243
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/