Dissociative Identity Disorder Test (Multiple Personality)
Research Dataset
Deenz Dissociative Identity Inventory (DII-28)
Normative and Psychometric Statistics
ROBUST
N=1400
α=0.935
72Countries
Abstract
Deenz Dissociative Identity Inventory (DII-28)
normative dataset currently contains
1400
participant records collected between
Jun 8, 2026
and
Sep 29, 2026
.
This psychometric dataset currently includes 1400 anonymous participant responses collected through voluntary participation. The observed mean score was 66.19 with a standard deviation of 17.78, indicating moderate score variability within the sampled population. Internal consistency reliability analysis demonstrated excellent reliability (Cronbach alpha = 0.935). Observed skewness (-0.94) and kurtosis (0.95) were examined as indicators of distribution quality. The score distribution appeared reasonably balanced and did not suggest substantial departures from normality.
1400
Participants
72
Countries
28
Scale Items
0.935
Reliability
Table 1
Dataset Overview
Assessment
Deenz Dissociative Identity Inventory (DII-28)
Research Status
Robust Dataset
Dataset Maturity
100
/100 —
ROBUST
Participants
1400
Countries Represented
72
Items
28
Dimensions
7
Data Collection Period
Jun 8, 2026
–
Sep 29, 2026
Reliability
α =
0.935
Note.
The current Deenz Dissociative Identity Inventory (DII-28) dataset contains 1400 participant records collected from 72 countries. Dataset maturity reflects sample size, geographic diversity, and internal consistency reliability.
Table 2
Descriptive Statistics
Statistic
Value
Mean Score
66.19%
Median Score
69
Standard Deviation
17.78
Variance
316.21
Standard Error
0.48
95% CI Lower
65.26
95% CI Upper
67.12
Minimum Score
0%
Maximum Score
97%
Observed Range
97
Note.
M = 66.19, SD = 17.78, Median = 69. The 95% confidence interval ranged from 65.26 to 67.12.
Table 3
Sample Characteristics
Variable
Summary
Participants
N =
1400
Countries
72
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
381
18-24
332
25-34
163
prefer_not
77
35-44
71
45-54
41
55plus
19
Gender Distribution
Gender
Participants
Female
559
Male
372
Prefer_not
153
Figure 1
Global Participation
Note.
Participants were represented across 72 countries. The largest contribution originated from DE (24.1% of available geographic records).
Country
Participants
Percent
DE
337
24.1%
US
171
12.2%
BR
141
10.1%
UA
121
8.6%
MX
65
4.6%
ES
55
3.9%
FR
55
3.9%
RU
39
2.8%
NL
37
2.6%
AR
26
1.9%
AT
26
1.9%
KZ
23
1.6%
IN
22
1.6%
GB
18
1.3%
PE
16
1.1%
BY
16
1.1%
CL
15
1.1%
CH
14
1%
CO
12
0.9%
CA
11
0.8%
BO
10
0.7%
VE
10
0.7%
EC
9
0.6%
CN
8
0.6%
LV
8
0.6%
PT
7
0.5%
EE
7
0.5%
CR
7
0.5%
PL
6
0.4%
GE
6
0.4%
FI
6
0.4%
DO
6
0.4%
UY
5
0.4%
BE
5
0.4%
IE
5
0.4%
PY
5
0.4%
CZ
4
0.3%
SE
4
0.3%
NO
3
0.2%
IT
3
0.2%
NI
3
0.2%
LT
3
0.2%
CU
3
0.2%
GT
3
0.2%
HN
3
0.2%
SG
3
0.2%
AU
3
0.2%
SV
2
0.1%
ID
2
0.1%
ZA
2
0.1%
MG
2
0.1%
T1
2
0.1%
SI
2
0.1%
JP
2
0.1%
MN
2
0.1%
SK
2
0.1%
NZ
2
0.1%
PK
1
0.1%
BS
1
0.1%
HR
1
0.1%
TW
1
0.1%
DK
1
0.1%
AZ
1
0.1%
PH
1
0.1%
BG
1
0.1%
MA
1
0.1%
RO
1
0.1%
PA
1
0.1%
TH
1
0.1%
FJ
1
0.1%
RS
1
0.1%
AM
1
0.1%
Table 4
Percentile Norms
Percentile
Score
Interpretation
10th
43%
Very Low
25th
57%
Below Average
50th
69%
Average
75th
79%
Above Average
90th
87%
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 = 66.19, SD = 17.78). Distribution characteristics included skewness (-0.94) and kurtosis (0.95).
Distribution indices suggested no substantial departures from normality.
Table 5
Reliability Analysis
Metric
Value
Cronbach Alpha
0.935
Reliability Classification
Excellent
Participants
1400
Items
28
Standard Error
0.48
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
Q28
(r = 0.06)
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 = 0.06), indicating comparatively weaker alignment with the overall construct.
Table 7
Dimension Norms
Dimension
Mean
SD
N
Dissociation
73.41%
21.23
1400
Identity Confusion
72.63%
24.32
1400
Alters
72.07%
24.36
1400
Flashbacks
69.04%
24.26
1400
Depersonalization
65.73%
25.58
1400
Amnesia
58.06%
22.7
1400
Mood Instability
53.65%
19.86
1400
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 Dissociation (73.4%), whereas the lowest observed dimension was Mood Instability (53.7%). The observed difference between dimensions was 19.8 percentage points. Substantial variation was observed between dimensions.
Table 8
Dataset Growth Summary
Metric
Value
Current Participants
1400
Countries
72
Collection Start
Jun 8, 2026
Collection End
Sep 29, 2026
Months Recorded
4
Note.
Growth statistics summarize cumulative participation throughout the observed data collection period.
Normative Data Notice
A total of
1400
participant responses were available for this assessment.
Dimension-level norms were calculated using
1400
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 Dissociative Identity Inventory (DII-28). Research Dataset. Retrieved from https://drdeenz.com/dissociative-identity-disorder-test/statistics/