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Dissociative Identity Disorder Test (Multiple Personality)

Research Dataset

Deenz Dissociative Identity Inventory (DII-28)

Normative and Psychometric Statistics
ROBUST N=723 α=0.932 53Countries
Abstract

Deenz Dissociative Identity Inventory (DII-28) normative dataset currently contains 723 participant records collected between Jun 8, 2026 and Jul 19, 2026 .

This psychometric dataset currently includes 723 anonymous participant responses collected through voluntary participation. The observed mean score was 65.37 with a standard deviation of 17.99, indicating moderate score variability within the sampled population. Internal consistency reliability analysis demonstrated excellent reliability (Cronbach alpha = 0.932). Observed skewness (-0.93) and kurtosis (0.94) were examined as indicators of distribution quality. The score distribution appeared reasonably balanced and did not suggest substantial departures from normality.

723
Participants
53
Countries
28
Scale Items
0.932
Reliability
Table 1
Dataset Overview
Assessment Deenz Dissociative Identity Inventory (DII-28)
Research Status Robust Dataset
Dataset Maturity 90 /100 — ROBUST
Participants 723
Countries Represented 53
Items 28
Dimensions 7
Data Collection Period Jun 8, 2026 – Jul 19, 2026
Reliability α = 0.932
Note. The current Deenz Dissociative Identity Inventory (DII-28) dataset contains 723 participant records collected from 53 countries. Dataset maturity reflects sample size, geographic diversity, and internal consistency reliability.
Table 2
Descriptive Statistics
Statistic Value
Mean Score 65.37%
Median Score 68
Standard Deviation 17.99
Variance 323.69
Standard Error 0.67
95% CI Lower 64.06
95% CI Upper 66.68
Minimum Score 0%
Maximum Score 97%
Observed Range 97
Note. M = 65.37, SD = 17.99, Median = 68. The 95% confidence interval ranged from 64.06 to 66.68.
Table 3
Sample Characteristics
Variable Summary
Participants N = 723
Countries 53
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 53 countries. The largest contribution originated from DE (20.3% of available geographic records).
Table 4
Percentile Norms
Percentile Score Interpretation
10th 40% Very Low
25th 56% Below Average
50th 68% Average
75th 78% Above Average
90th 86% 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 = 65.37, SD = 17.99). Distribution characteristics included skewness (-0.93) and kurtosis (0.94). Distribution indices suggested no substantial departures from normality.
Table 5
Reliability Analysis
Metric Value
Cronbach Alpha 0.932
Reliability Classification Excellent
Participants 723
Items 28
Standard Error 0.67
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 Item Quality r Rating Q10 0.69 Excellent Q15 0.69 Excellent Q13 0.68 Excellent Q12 0.67 Excellent Q24 0.67 Excellent Q9 0.66 Excellent Q14 0.65 Excellent Q21 0.63 Excellent Q22 0.62 Excellent Q25 0.61 Excellent Q23 0.61 Excellent Q11 0.59 Excellent Q5 0.59 Excellent Q6 0.57 Excellent Q8 0.56 Excellent Q16 0.56 Excellent Q7 0.56 Excellent Q18 0.53 Excellent Q26 0.53 Excellent Q4 0.51 Excellent Q17 0.49 Acceptable Q19 0.48 Acceptable Q3 0.47 Acceptable Q20 0.46 Acceptable Q27 0.45 Acceptable Q2 0.44 Acceptable Q1 0.38 Acceptable Q28 0.09 Problematic
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 = 0.09)
    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 = 0.09), indicating comparatively weaker alignment with the overall construct.
Table 7
Dimension Norms
Dimension Mean SD N
Dissociation 72.35% 21.92 723
Identity Confusion 70.83% 25 723
Alters 70.72% 24.57 723
Flashbacks 68.54% 24.24 723
Depersonalization 64.93% 25.95 723
Amnesia 58.15% 22.3 723
Mood Instability 53.92% 20.22 723
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 (72.4%), whereas the lowest observed dimension was Mood Instability (53.9%). The observed difference between dimensions was 18.4 percentage points. Substantial variation was observed between dimensions.
Table 8
Dataset Growth Summary
Metric Value
Current Participants 723
Countries 53
Collection Start Jun 8, 2026
Collection End Jul 19, 2026
Months Recorded 2
Note. Growth statistics summarize cumulative participation throughout the observed data collection period.
Normative Data Notice

A total of 723 participant responses were available for this assessment. Dimension-level norms were calculated using 723 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/

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