Difficult Person Traits Scale (DDTS)
normative dataset currently contains
112
participant records collected between
Jun 11, 2026
and
Oct 15, 2026
.
This psychometric dataset currently includes 112 anonymous participant responses collected through voluntary participation. The observed mean score was 50.38 with a standard deviation of 15, indicating moderate score variability within the sampled population. Internal consistency reliability analysis demonstrated excellent reliability (Cronbach alpha = 0.91). Observed skewness (0.38) and kurtosis (0.51) were examined as indicators of distribution quality. The score distribution appeared reasonably balanced and did not suggest substantial departures from normality.
112
Participants
31
Countries
35
Scale Items
0.91
Reliability
Table 1
Dataset Overview
Assessment
Difficult Person Traits Scale (DDTS)
Research Status
Established Dataset
Dataset Maturity
70
/100 —
STRONG
Participants
112
Countries Represented
31
Items
35
Dimensions
7
Data Collection Period
Jun 11, 2026
–
Oct 15, 2026
Reliability
α =
0.91
Note.
The current Difficult Person Traits Scale (DDTS) dataset contains 112 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
50.38%
Median Score
49
Standard Deviation
15
Variance
225.01
Standard Error
1.42
95% CI Lower
47.61
95% CI Upper
53.16
Minimum Score
6%
Maximum Score
89%
Observed Range
83
Note.
M = 50.38, SD = 15, Median = 49. The 95% confidence interval ranged from 47.61 to 53.16.
Table 3
Sample Characteristics
Variable
Summary
Participants
N =
112
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
23
25-34
21
under18
18
45-54
12
55plus
9
35-44
4
prefer_not
1
Gender Distribution
Gender
Participants
Female
51
Male
33
Prefer_not
4
Figure 1
Global Participation
Note.
Participants were represented across 31 countries. The largest contribution originated from BR (22.3% of available geographic records).
Country
Participants
Percent
BR
25
22.3%
US
14
12.5%
DE
12
10.7%
ES
6
5.4%
MX
5
4.5%
AT
4
3.6%
NL
4
3.6%
FR
3
2.7%
HR
3
2.7%
RO
3
2.7%
NO
2
1.8%
CA
2
1.8%
FI
2
1.8%
CO
2
1.8%
CH
2
1.8%
AR
2
1.8%
DO
2
1.8%
IN
2
1.8%
GB
2
1.8%
PE
2
1.8%
AM
2
1.8%
SE
2
1.8%
UA
1
0.9%
LV
1
0.9%
TR
1
0.9%
PT
1
0.9%
BY
1
0.9%
AU
1
0.9%
IE
1
0.9%
VE
1
0.9%
PH
1
0.9%
Table 4
Percentile Norms
Percentile
Score
Interpretation
10th
34%
Very Low
25th
40%
Below Average
50th
49%
Average
75th
57%
Above Average
90th
72%
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 6% to 89% (M = 50.38, SD = 15). Distribution characteristics included skewness (0.38) and kurtosis (0.51).
Distribution indices suggested no substantial departures from normality.
Table 5
Reliability Analysis
Metric
Value
Cronbach Alpha
0.91
Reliability Classification
Excellent
Participants
112
Items
35
Standard Error
1.42
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 identified4
itemsthat may benefit from future review.
Items Recommended for Future Review
Q6
(r = 0.2)
I rarely change my mind once I have made a decision.
Q16
(r = 0.13)
I often act before thinking things through.
Q34
(r = 0.16)
I sometimes appear emotionally cold or detached.
Q35
(r = 0.19)
I have little concern for the feelings of people I do not know well.
The lowest item–total correlation was observed for Q16 ("I often act before thinking things through."; r = 0.13), indicating comparatively weaker alignment with the overall construct.
Table 7
Dimension Norms
Dimension
Mean
SD
N
Rigidity
60.71%
22.83
112
Aggressiveness
57.88%
24.57
112
Stubbornness
55%
21.44
112
Defensiveness
53.8%
23.18
112
Impulsiveness
49.78%
21.47
112
Grandiosity
45.18%
23.98
112
Callousness
30.84%
19.06
112
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 (60.7%), whereas the lowest observed dimension was Callousness (30.8%). The observed difference between dimensions was 29.9 percentage points. Substantial variation was observed between dimensions.
Table 8
Dataset Growth Summary
Metric
Value
Current Participants
112
Countries
31
Collection Start
Jun 11, 2026
Collection End
Oct 15, 2026
Months Recorded
5
Note.
Growth statistics summarize cumulative participation throughout the observed data collection period.
Normative Data Notice
A total of
112
participant responses were available for this assessment.
Dimension-level norms were calculated using
112
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
Difficult Person Traits Scale (DDTS). Research Dataset. Retrieved from https://drdeenz.com/difficult-person-test/statistics/