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Anhedonia Test

Research Dataset

Deenz Multidimensional Anhedonia Scale (DMAS-27)

Normative and Psychometric Statistics
ROBUST N=640 α=0.919 61Countries
Abstract

Deenz Multidimensional Anhedonia Scale (DMAS-27) normative dataset currently contains 640 participant records collected between Jun 11, 2026 and Oct 11, 2026 .

This psychometric dataset currently includes 640 anonymous participant responses collected through voluntary participation. The observed mean score was 64.49 with a standard deviation of 16.19, indicating moderate score variability within the sampled population. Internal consistency reliability analysis demonstrated excellent reliability (Cronbach alpha = 0.919). Observed skewness (-0.91) and kurtosis (1.3) were examined as indicators of distribution quality. The score distribution appeared reasonably balanced and did not suggest substantial departures from normality.

640
Participants
61
Countries
27
Scale Items
0.919
Reliability
Table 1
Dataset Overview
Assessment Deenz Multidimensional Anhedonia Scale (DMAS-27)
Research Status Robust Dataset
Dataset Maturity 90 /100 — ROBUST
Participants 640
Countries Represented 61
Items 27
Dimensions 3
Data Collection Period Jun 11, 2026 – Oct 11, 2026
Reliability α = 0.919
Note. The current Deenz Multidimensional Anhedonia Scale (DMAS-27) dataset contains 640 participant records collected from 61 countries. Dataset maturity reflects sample size, geographic diversity, and internal consistency reliability.
Table 2
Descriptive Statistics
Statistic Value
Mean Score 64.49%
Median Score 67
Standard Deviation 16.19
Variance 262.21
Standard Error 0.64
95% CI Lower 63.24
95% CI Upper 65.75
Minimum Score 0%
Maximum Score 96%
Observed Range 96
Note. M = 64.49, SD = 16.19, Median = 67. The 95% confidence interval ranged from 63.24 to 65.75.
Table 3
Sample Characteristics
Variable Summary
Participants N = 640
Countries 61
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 61 countries. The largest contribution originated from DE (22.3% of available geographic records).
Table 4
Percentile Norms
Percentile Score Interpretation
10th 44% Very Low
25th 56% Below Average
50th 67% Average
75th 75% Above Average
90th 83% Elevated
Note. Percentile values provide preliminary normative benchmarks derived from the current Deenz Multidimensional Anhedonia Scale (DMAS-27) sample.
Figure 2
Score Distribution
Note. Observed scores ranged from 0% to 96% (M = 64.49, SD = 16.19). Distribution characteristics included skewness (-0.91) and kurtosis (1.3). Distribution indices suggested no substantial departures from normality.
Table 5
Reliability Analysis
Metric Value
Cronbach Alpha 0.919
Reliability Classification Excellent
Participants 640
Items 27
Standard Error 0.64
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 Item Quality r Rating Q3 0.69 Excellent Q25 0.69 Excellent Q24 0.67 Excellent Q21 0.66 Excellent Q4 0.65 Excellent Q19 0.61 Excellent Q11 0.6 Excellent Q20 0.58 Excellent Q18 0.58 Excellent Q17 0.57 Excellent Q26 0.57 Excellent Q7 0.56 Excellent Q16 0.56 Excellent Q1 0.52 Excellent Q23 0.52 Excellent Q8 0.51 Excellent Q9 0.51 Excellent Q15 0.5 Excellent Q13 0.49 Acceptable Q6 0.48 Acceptable Q10 0.45 Acceptable Q2 0.43 Acceptable Q22 0.42 Acceptable Q12 0.42 Acceptable Q5 0.4 Acceptable Q14 0.39 Acceptable Q27 -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 identified1 itemthat may benefit from future review.

Items Recommended for Future Review
  • Q27 (r = -0.02)
    I often make little effort to enjoy activities I used to like.
The lowest item–total correlation was observed for Q27 ("I often make little effort to enjoy activities I used to like."; r = -0.02), indicating comparatively weaker alignment with the overall construct.
Table 7
Dimension Norms
Dimension Mean SD N
Emotional Anhedonia 67.69% 16.96 640
Social Anhedonia 67.47% 18.9 640
Physical Anhedonia 58.25% 20.18 640
Note. Dimension statistics summarize normative performance across the major constructs measured by Deenz Multidimensional Anhedonia Scale (DMAS-27).
Figure 5
Dimension Profile
Note. The highest observed dimension was Emotional Anhedonia (67.7%), whereas the lowest observed dimension was Physical Anhedonia (58.3%). The observed difference between dimensions was 9.4 percentage points. Moderate variation was observed between dimensions.
Table 8
Dataset Growth Summary
Metric Value
Current Participants 640
Countries 61
Collection Start Jun 11, 2026
Collection End Oct 11, 2026
Months Recorded 5
Note. Growth statistics summarize cumulative participation throughout the observed data collection period.
Normative Data Notice

A total of 640 participant responses were available for this assessment. Dimension-level norms were calculated using 640 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

Deenz Multidimensional Anhedonia Scale (DMAS-27). Research Dataset. Retrieved from https://drdeenz.com/anhedonia-test/statistics/

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