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RAADS-R (Ritvo Autism Asperger Diagnostic Scale – Revised) Research Statistics

Assessment Information
  • Sample Adequacy: Preliminary dataset. Interpret norms cautiously.
  • Research Status: PRELIMINARY NORMATIVE DATASET
  • Items: 80
  • Dimensions: 6
  • Dataset Maturity: The current dataset achieved a maturity score of 35/100 and is classified as PRELIMINARY.

Table 1
Normative Dataset Overview
Descriptive characteristics of the current normative sample.
Participants 18
Countries Represented 2
Dataset Maturity 35/100 — PreliminaryDataset
Research Status PRELIMINARY NORMATIVE DATASET
Sample Adequacy Preliminary dataset. Interpret norms cautiously.
Data Collection Period May 21, 2026 – Jun 29, 2026
The current normative dataset consists of 18 participants collected from 2 countries.
Table 2
Score Statistics
Measures of central tendency and variability.
Mean Score 48.06%
Median Score 46
Standard Deviation 13.93
Variance 194.17
Standard Error (SEM) 3.28
Reliability (α) 0.933
Items 80
Dimensions 6
The sample demonstrated a mean score of 48.06% (Mdn = 46, SD = 13.93).
Table 3
Distribution Characteristics
Distribution shape and score dispersion indicators.
Observed Score Range 77
Maximum Observed Score 90%
Minimum Observed Score 13%
95% Confidence Interval 41.62– 54.49
Skewness 0.79
Kurtosis 6.67
Observed skewness (0.79) and kurtosis (6.67) provide indicators of distribution quality and normality.
Global Participation Chart Participants IN 17 #1 US 1 #2
Global Participation Interpretation

The current dataset includes responses from 2countries . The largest contribution currently comes from IN which represents approximately 94.4% 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 44 Population Median 25th Percentile 45 Population Median 50th Percentile 46 Population Median 75th Percentile 47 Population Median 90th Percentile 56
Normative Interpretation

The current normative dataset indicates that approximately 10% of participants scored below 44%, while 90% scored above this level. The median score was 46%, meaning that half of participants scored below this value and half scored above it. Scores of 47% or greater were achieved by approximately the highest 25% of participants, whereas scores of 56% 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

10-19 1 40-49 12 50-59 4 90-99 1
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 0.79 and a kurtosis of 6.67.

The distribution demonstrates mild departures from normality, although the overall score pattern remains broadly interpretable for preliminary normative purposes.

Reliability Analysis

0.933 Poor Acceptable Good Excellent

EXCELLENT RELIABILITY

The assessment demonstrated excellent internal consistency reliability (Cronbach's α = 0.933), suggesting that the assessment items measure a relatively coherent psychological construct.

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: 18
Minimum Recommended: 100

Dimension Norms

Dimension Profile Mean SD 50% Cognitive Style & Detail Focus 60.4% 21.2 Social Adaptation & Masking 53.1% 18.4 Social Communication & Interaction 48.4% 14.9 Sensory & Motor Experiences 48.4% 18.8 Language & Conversational Style 45.7% 13.8 Routine & Restricted Patterns 40.9% 13.8
Dimension Interpretation

The highest scoring dimension in the current sample was Cognitive Style & Detail Focus (60.4%). The lowest scoring dimension was Routine & Restricted Patterns (40.9%). 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.

Research Interpretation

This psychometric dataset currently includes 18 anonymous participant responses collected through voluntary participation. The observed mean score was 48.06 with a standard deviation of 13.93, indicating moderate score variability within the sampled population. Internal consistency reliability analysis demonstrated excellent reliability (Cronbach alpha = 0.933). Observed skewness (0.79) and kurtosis (6.67) 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.

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

RAADS-R (Ritvo Autism Asperger Diagnostic Scale – Revised). Trait Profiler Interactive Research Dataset. Retrieved from https://traitprofiler.com/raads-r/statistics/

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