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Hare Psychopathy Checklist (Original) (PCL-22) Research Statistics

Assessment Information
  • Sample Adequacy: Established dataset with reasonably stable norms.
  • Research Status: ESTABLISHED DATASET
  • Items: 22
  • Dimensions: 10
  • Dataset Maturity: The current dataset achieved a maturity score of 55/100 and is classified as DEVELOPING.

Table 1
Normative Dataset Overview
Descriptive characteristics of the current normative sample.
Participants 121
Countries Represented 4
Dataset Maturity 55/100 — DevelopingDataset
Research Status ESTABLISHED NORMATIVE DATASET
Sample Adequacy Established dataset with reasonably stable norms.
Data Collection Period May 25, 2026 – Jun 6, 2026
The current normative dataset consists of 121 participants collected from 4 countries.
Table 2
Score Statistics
Measures of central tendency and variability.
Mean Score 50.65%
Median Score 39
Standard Deviation 22.2
Variance 493.05
Standard Error (SEM) 2.02
Reliability (α) 0.95
Items 22
Dimensions 10
The sample demonstrated a mean score of 50.65% (Mdn = 39, SD = 22.2).
Table 3
Distribution Characteristics
Distribution shape and score dispersion indicators.
Observed Score Range 96
Maximum Observed Score 98%
Minimum Observed Score 2%
95% Confidence Interval 46.7– 54.61
Skewness 0.94
Kurtosis 0.19
Observed skewness (0.94) and kurtosis (0.19) provide indicators of distribution quality and normality.
Global Participation Chart Participants IN 118 #1 GB 1 #2 DE 1 #3 CH 1 #4
Global Participation Interpretation

The current dataset includes responses from 4countries . The largest contribution currently comes from IN which represents approximately 97.5% of all participants. International participation enhances sample diversity and improves the generalizability of normative findings across geographic regions.

Normative Percentile Distribution

Population Median 10th Percentile 34 Population Median 25th Percentile 34 Population Median 50th Percentile 39 Population Median 75th Percentile 59 Population Median 90th Percentile 98
Normative Interpretation

The current normative dataset indicates that approximately 10% of participants scored below 34%, while 90% scored above this level. The median score was 39%, meaning that half of participants scored below this value and half scored above it. Scores of 59% or greater were achieved by approximately the highest 25% of participants, whereas scores of 98% or greater were achieved by approximately the highest 10% of participants. These percentile values provide preliminary normative benchmarks that can be used to contextualize individual assessment results relative to the current community sample.

Distribution Histogram

0-9 2 30-39 59 40-49 1 50-59 36 60-69 6 80-89 2 90-99 15
Distribution Interpretation

This histogram displays the distribution of participant scores across the assessment. A balanced bell-shaped pattern generally indicates good score dispersion and stronger normative utility, whereas highly skewed distributions may indicate floor effects, ceiling effects, or sample bias.

Distribution Quality

The score distribution demonstrated a skewness of 0.94 and a kurtosis of 0.19.

The score distribution appears reasonably balanced and does not currently suggest substantial departures from normality.

Reliability Analysis

0.95 Poor Acceptable Good Excellent

EXCELLENT RELIABILITY

The assessment demonstrated excellent internal consistency reliability (Cronbach's α = 0.95), suggesting that the assessment items measure a relatively coherent psychological construct.

Item–Total Correlations

Item Item Quality r Rating Q12 0.94 Excellent Q20 0.85 Excellent Q22 0.84 Excellent Q16 0.83 Excellent Q6 0.81 Excellent Q8 0.81 Excellent Q13 0.81 Excellent Q21 0.8 Excellent Q10 0.78 Excellent Q7 0.76 Excellent Q2 0.73 Excellent Q9 0.7 Excellent Q18 0.68 Excellent Q15 0.68 Excellent Q11 0.66 Excellent Q3 0.65 Excellent Q1 0.64 Excellent Q17 0.53 Excellent Q19 0.5 Acceptable Q5 0.45 Acceptable Q14 0.16 Problematic Q4 -0.02 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 identified 2 itemsthat may benefit from future review.

Items Recommended for Future Review
  • Q4 (r = -0.02)
    Proneness to boredom / low frustration tolerance
  • Q14 (r = 0.16)
    Lack of realistic, long-term plans

Lower item–total correlations may indicate weaker alignment with the overall construct, greater response variability, or the need for further refinement. These findings should be interpreted cautiously and considered alongside additional psychometric evidence as the normative sample grows.

Dimension Norms

Dimension Profile Mean SD 50% Behavioral Instability 70.4% 16.4 Callousness and Lack of Empathy 52.1% 8.5 Impulsivity 43% 17.1 Social Deviance 41.5% 17.6 Grandiosity and Narcissism 38.3% 22 Irresponsibility 38% 21.7 Interpersonal Manipulation 37.9% 14.2 Emotional Detachment 27.8% 44 Antisocial Behavior 27.5% 21.9 Criminal Versatility 19.8% 32.3
Dimension Interpretation

The highest scoring dimension in the current sample was Behavioral Instability (70.4%). The lowest scoring dimension was Criminal Versatility (19.8%). Dimensions located above the 50% reference line represent characteristics that were more strongly endorsed within the current participant sample. Standard deviations indicate the degree of variability observed across participant responses.

Normative Dataset Growth 107 May 2026 121 Jun 2026
Dataset Growth Interpretation

The current normative dataset contains 121 participants . The cumulative growth curve illustrates how the participant sample has expanded over time. Increasing sample sizes generally improve the stability of percentile norms, reliability estimates, and other psychometric statistics.

Normative Data Notice

A total of 121 participant responses were available for this assessment. Dimension-level norms were calculated using 81 valid response records. Approximately 40 response record(s) were excluded from dimension-level normative calculations due to incomplete response patterns, historical data inconsistencies, or automated data-quality screening procedures.

Research Interpretation

This psychometric dataset currently includes 121 anonymous participant responses collected through voluntary participation. The observed mean score was 50.65 with a standard deviation of 22.2, indicating moderate score variability within the sampled population. Internal consistency reliability analysis demonstrated excellent reliability (Cronbach alpha = 0.95). Observed skewness (0.94) and kurtosis (0.19) were examined as indicators of distribution quality. The score distribution appeared reasonably balanced and did not suggest substantial departures from normality.

Ethical & Research Notice

All responses included in this dataset are collected anonymously through voluntary participation. No personally identifying information is stored. Results are intended exclusively for educational, psychometric, research, and self-reflective purposes and should not be used as clinical diagnoses. Trait Profiler continuously monitors response quality, distribution stability, and internal consistency to support ethical psychometric reporting.

Dataset Export

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Research Citation

Hare Psychopathy Checklist (Original) (PCL-22). Trait Profiler Interactive Research Dataset. Retrieved from https://traitprofiler.com/hare-psychopathy-checklist/statistics/

License: Creative Commons Attribution 4.0 International (CC BY 4.0)