Deenz Dissociative Identity Inventory (DII-28)
normative dataset currently contains
372
participant records collected between
Jun 8, 2026
and
Jun 25, 2026
.
This psychometric dataset currently includes 372 anonymous participant responses collected through voluntary participation. The observed mean score was 63.91 with a standard deviation of 18.61, indicating moderate score variability within the sampled population. Internal consistency reliability analysis demonstrated excellent reliability (Cronbach alpha = 0.928). Observed skewness (-0.84) and kurtosis (0.55) were examined as indicators of distribution quality. The score distribution appeared reasonably balanced and did not suggest substantial departures from normality.
372
Participants
36
Countries
28
Items
0.928
Reliability
Table 1
Dataset Overview
Assessment
Deenz Dissociative Identity Inventory (DII-28)
Research Status
Established Dataset
Dataset Maturity
80
/100 —
STRONG
Participants
372
Countries Represented
36
Items
28
Dimensions
7
Data Collection Period
Jun 8, 2026
–
Jun 25, 2026
Reliability
α =
0.928
Note.
The current Deenz Dissociative Identity Inventory (DII-28) dataset contains 372 participant records collected from 36 countries. Dataset maturity reflects sample size, geographic diversity, and internal consistency reliability.
Table 2
Descriptive Statistics
Statistic
Value
Mean Score
63.91%
Median Score
67
Standard Deviation
18.61
Variance
346.16
Standard Error
0.96
95% CI Lower
62.02
95% CI Upper
65.8
Minimum Score
0%
Maximum Score
97%
Observed Range
97
Note.
M = 63.91, SD = 18.61, Median = 67. The 95% confidence interval ranged from 62.02 to 65.8.
Table 3
Sample Characteristics
Variable
Summary
Participants
N =
372
Countries
36
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
under18
38
prefer_not
26
18-24
21
25-34
13
35-44
4
45-54
4
55plus
1
Gender Distribution
Gender
Participants
Male
51
Female
48
Prefer_not
8
Figure 1
Global Participation
Note.
Participants were represented across 36 countries. The largest contribution originated from US (16.7% of available geographic records).
Country
Participants
Percent
US
62
16.7%
DE
56
15.1%
UA
46
12.4%
BR
42
11.3%
IN
16
4.3%
AT
14
3.8%
MX
13
3.5%
NL
13
3.5%
FR
12
3.2%
RU
9
2.4%
GB
7
1.9%
CN
7
1.9%
CL
6
1.6%
ES
6
1.6%
VE
6
1.6%
CH
5
1.3%
PE
5
1.3%
UY
5
1.3%
IE
4
1.1%
EC
4
1.1%
LV
3
0.8%
BY
3
0.8%
BO
3
0.8%
FI
3
0.8%
PY
2
0.5%
DO
2
0.5%
NZ
2
0.5%
SG
2
0.5%
CO
2
0.5%
AR
2
0.5%
GE
2
0.5%
NI
2
0.5%
EE
2
0.5%
LT
2
0.5%
GT
1
0.3%
HN
1
0.3%
Table 4
Percentile Norms
Percentile
Score
Interpretation
10th
38%
Very Low
25th
53%
Below Average
50th
67%
Average
75th
78%
Above Average
90th
84%
Elevated
Note.
Percentile values provide preliminary normative benchmarks derived from the current Deenz Dissociative Identity Inventory (DII-28) sample.
Figure 2
Score Distribution
Note.
Observed scores ranged from 0% to 97% (M = 63.91, SD = 18.61). Distribution characteristics included skewness (-0.84) and kurtosis (0.55).
Distribution indices suggested no substantial departures from normality.
Table 5
Reliability Analysis
Metric
Value
Cronbach Alpha
0.928
Reliability Classification
Excellent
Participants
372
Items
28
Standard Error
0.96
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 identified2
itemsthat may benefit from future review.
Items Recommended for Future Review
Q1
(r = 0.26)
I sometimes have difficulty remembering my personal information.
Q28
(r = 0.15)
My emotional reactions can change dramatically within a short period.
The lowest item–total correlation was observed for Q28 ("My emotional reactions can change dramatically within a short period."; r = 0.15), indicating comparatively weaker alignment with the overall construct.
Table 7
Dimension Norms
Dimension
Mean
SD
N
Identity Confusion
68.06%
25.94
83
Dissociation
67.28%
26.59
93
Flashbacks
67.01%
24.63
274
Alters
65.49%
27.43
127
Depersonalization
64.73%
25.22
83
Amnesia
58.19%
22.95
151
Mood Instability
51.58%
19.44
83
Note.
Dimension statistics summarize normative performance across the major constructs measured by Deenz Dissociative Identity Inventory (DII-28).
Figure 5
Dimension Profile
Note.
The highest observed dimension was Identity Confusion (68.1%), whereas the lowest observed dimension was Mood Instability (51.6%). The observed difference between dimensions was 16.5 percentage points. Substantial variation was observed between dimensions.
Table 8
Dataset Growth Summary
Metric
Value
Current Participants
372
Countries
36
Collection Start
Jun 8, 2026
Collection End
Jun 25, 2026
Months Recorded
1
Note.
Growth statistics summarize cumulative participation throughout the observed data collection period.
Normative Data Notice
A total of
372
participant responses were available for this assessment.
Dimension-level norms were calculated using
274
valid response records.
Approximately
98
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 Dissociative Identity Inventory (DII-28). Research Dataset. Retrieved from https://drdeenz.com/dissociative-identity-disorder-test/statistics/