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Research Dataset

Difficult Person Traits Scale (DDTS)

Normative and Psychometric Statistics
PRELIMINARY N=34 α=0.867 11Countries
Abstract

Difficult Person Traits Scale (DDTS) normative dataset currently contains 34 participant records collected between Jun 11, 2026 and Jun 24, 2026 .

This psychometric dataset currently includes 34 anonymous participant responses collected through voluntary participation. The observed mean score was 49.91 with a standard deviation of 12.18, indicating moderate score variability within the sampled population. Internal consistency reliability analysis demonstrated good reliability (Cronbach alpha = 0.867). Observed skewness (1.24) and kurtosis (1.02) were examined as indicators of distribution quality. The distribution demonstrated mild departures from normality, although the overall score pattern remained broadly interpretable for preliminary normative purposes.

34
Participants
11
Countries
35
Items
0.867
Reliability
Table 1
Dataset Overview
Assessment Difficult Person Traits Scale (DDTS)
Research Status Developing Dataset
Dataset Maturity 40 /100 — PRELIMINARY
Participants 34
Countries Represented 11
Items 35
Dimensions 7
Data Collection Period Jun 11, 2026 – Jun 24, 2026
Reliability α = 0.867
Note. The current Difficult Person Traits Scale (DDTS) dataset contains 34 participant records collected from 11 countries. Dataset maturity reflects sample size, geographic diversity, and internal consistency reliability.
Table 2
Descriptive Statistics
Statistic Value
Mean Score 49.91%
Median Score 46
Standard Deviation 12.18
Variance 148.26
Standard Error 2.09
95% CI Lower 45.82
95% CI Upper 54
Minimum Score 36%
Maximum Score 81%
Observed Range 45
Note. M = 49.91, SD = 12.18, Median = 46. The 95% confidence interval ranged from 45.82 to 54.
Table 3
Sample Characteristics
Variable Summary
Participants N = 34
Countries 11
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 11 countries. The largest contribution originated from BR (35.3% of available geographic records).
Table 4
Percentile Norms
Percentile Score Interpretation
10th 36% Very Low
25th 40% Below Average
50th 46% Average
75th 56% Above Average
90th 63% Elevated
Note. Percentile values provide preliminary normative benchmarks derived from the current Difficult Person Traits Scale (DDTS) sample.
Figure 2
Score Distribution
Note. Observed scores ranged from 36% to 81% (M = 49.91, SD = 12.18). Distribution characteristics included skewness (1.24) and kurtosis (1.02). Distribution indices suggested mild departures from normality.
Table 5
Reliability Analysis
Metric Value
Cronbach Alpha 0.867
Reliability Classification Good
Participants 34
Items 35
Standard Error 2.09
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: 34
Minimum Recommended: 100
Table 7
Dimension Norms
Dimension Mean SD N
Rigidity 66.47% 17.03 17
Stubbornness 61.18% 12.44 17
Impulsiveness 54.71% 28.8 17
Aggressiveness 52.65% 27.73 17
Defensiveness 52.35% 23.53 17
Grandiosity 44.71% 16.15 17
Callousness 19.12% 13.37 17
Note. Dimension statistics summarize normative performance across the major constructs measured by Difficult Person Traits Scale (DDTS).
Figure 5
Dimension Profile
Note. The highest observed dimension was Rigidity (66.5%), whereas the lowest observed dimension was Callousness (19.1%). The observed difference between dimensions was 47.4 percentage points. Substantial variation was observed between dimensions.
Table 8
Dataset Growth Summary
Metric Value
Current Participants 34
Countries 11
Collection Start Jun 11, 2026
Collection End Jun 24, 2026
Months Recorded 1
Note. Growth statistics summarize cumulative participation throughout the observed data collection period.
Normative Data Notice

A total of 34 participant responses were available for this assessment. Dimension-level norms were calculated using 17 valid response records. Approximately 17 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

Difficult Person Traits Scale (DDTS). Research Dataset. Retrieved from https://drdeenz.com/difficult-person-test/statistics/

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