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RAADS-14 | Ritvo Autism & Asperger Diagnostic Scale

Research Dataset

Ritvo Autism Asperger Diagnostic Scale – (RAADS-14)

Normative and Psychometric Statistics
PRELIMINARY N=12 α=0 7Countries
Abstract

Ritvo Autism Asperger Diagnostic Scale – (RAADS-14) normative dataset currently contains 12 participant records collected between Jul 5, 2026 and Aug 11, 2026 .

This psychometric dataset currently includes 12 anonymous participant responses collected through voluntary participation. The observed mean score was 41.92 with a standard deviation of 28.82, indicating moderate score variability within the sampled population. Internal consistency reliability analysis produced a Cronbach alpha of 0, which falls below commonly accepted psychometric standards and should be interpreted cautiously until additional data are collected. Observed skewness (0.48) and kurtosis (-0.54) were examined as indicators of distribution quality. The score distribution appeared reasonably balanced and did not suggest substantial departures from normality.

12
Participants
7
Countries
14
Scale Items
0
Reliability
Table 1
Dataset Overview
Assessment Ritvo Autism Asperger Diagnostic Scale – (RAADS-14)
Research Status Preliminary Dataset
Dataset Maturity 10 /100 — PRELIMINARY
Participants 12
Countries Represented 7
Items 14
Dimensions 10
Data Collection Period Jul 5, 2026 – Aug 11, 2026
Reliability α = 0
Note. The current Ritvo Autism Asperger Diagnostic Scale – (RAADS-14) dataset contains 12 participant records collected from 7 countries. Dataset maturity reflects sample size, geographic diversity, and internal consistency reliability.
Table 2
Descriptive Statistics
Statistic Value
Mean Score 41.92%
Median Score 38
Standard Deviation 28.82
Variance 830.81
Standard Error 8.32
95% CI Lower 25.61
95% CI Upper 58.23
Minimum Score 5%
Maximum Score 93%
Observed Range 88
Note. M = 41.92, SD = 28.82, Median = 38. The 95% confidence interval ranged from 25.61 to 58.23.
Table 3
Sample Characteristics
Variable Summary
Participants N = 12
Countries 7
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 7 countries. The largest contribution originated from RS (25% of available geographic records).
Table 4
Percentile Norms
Percentile Score Interpretation
10th 7% Very Low
25th 10% Below Average
50th 38% Average
75th 57% Above Average
90th 64% Elevated
Note. Percentile values provide preliminary normative benchmarks derived from the current Ritvo Autism Asperger Diagnostic Scale – (RAADS-14) sample.
Figure 2
Score Distribution
Note. Observed scores ranged from 5% to 93% (M = 41.92, SD = 28.82). Distribution characteristics included skewness (0.48) and kurtosis (-0.54). Distribution indices suggested no substantial departures from normality.
Table 5
Reliability Analysis
Metric Value
Cronbach Alpha 0
Reliability Classification Unacceptable
Participants 12
Items 14
Standard Error 8.32
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: 12
Minimum Recommended: 100
Table 7
Dimension Norms
Dimension Mean SD N
Nonverbal Communication Difficulties 66.75% 42.64 12
Literal Interpretation 61.17% 46.79 12
Social Understanding Difficulties 55.58% 41.09 12
Conversational Timing Difficulties 55.58% 49.92 12
Detail-Focused Thinking 50% 43.86 12
Sensory Overload 49.92% 46.09 12
Social Communication Ability 41.67% 47.43 12
Sensory Sensitivity 37.5% 34.88 12
Social Interaction Difficulties 24.92% 38.78 12
Need for Sameness 0% 0 12
Note. Dimension statistics summarize normative performance across the major constructs measured by Ritvo Autism Asperger Diagnostic Scale – (RAADS-14).
Figure 5
Dimension Profile
Note. The highest observed dimension was Nonverbal Communication Difficulties (66.8%), whereas the lowest observed dimension was Need for Sameness (0%). The observed difference between dimensions was 66.8 percentage points. Substantial variation was observed between dimensions.
Table 8
Dataset Growth Summary
Metric Value
Current Participants 12
Countries 7
Collection Start Jul 5, 2026
Collection End Aug 11, 2026
Months Recorded 2
Note. Growth statistics summarize cumulative participation throughout the observed data collection period.
Normative Data Notice

A total of 12 participant responses were available for this assessment. Dimension-level norms were calculated using 12 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

Ritvo Autism Asperger Diagnostic Scale – (RAADS-14). Research Dataset. Retrieved from https://drdeenz.com/raads-14/statistics/

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