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Major Depression Inventory (MDI) Research Statistics

Assessment Information
  • Sample Adequacy: Preliminary dataset. Interpret norms cautiously.
  • Research Status: PRELIMINARY NORMATIVE DATASET
  • Items: 12
  • Dimensions: 12
  • Dataset Maturity: The current dataset achieved a maturity score of 0/100 and is classified as EARLY DATASET.

Table 1
Normative Dataset Overview
Descriptive characteristics of the current normative sample.
Participants 2
Countries Represented 1
Dataset Maturity 0/100 — Early DatasetDataset
Research Status PRELIMINARY NORMATIVE DATASET
Sample Adequacy Preliminary dataset. Interpret norms cautiously.
Data Collection Period May 24, 2026 – May 24, 2026
The current normative dataset consists of 2 participants collected from 1 countries.
Table 2
Score Statistics
Measures of central tendency and variability.
Mean Score 46.5%
Median Score 46.5
Standard Deviation 30.41
Variance 924.5
Standard Error (SEM) 21.5
Reliability (α) 0
Items 12
Dimensions 12
The sample demonstrated a mean score of 46.5% (Mdn = 46.5, SD = 30.41).
Table 3
Distribution Characteristics
Distribution shape and score dispersion indicators.
Observed Score Range 43
Maximum Observed Score 68%
Minimum Observed Score 25%
95% Confidence Interval 4.36– 88.64
Skewness 0
Kurtosis 0
Observed skewness (0) and kurtosis (0) provide indicators of distribution quality and normality.
Global Participation Chart Participants IN 2 #1
Global Participation Interpretation

The current dataset includes responses from 1countries . The largest contribution currently comes from IN which represents approximately 100% 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 25 Population Median 25th Percentile 25 Population Median 50th Percentile 25 Population Median 75th Percentile 25 Population Median 90th Percentile 25
Normative Interpretation

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

20-29 1 60-69 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 and a kurtosis of 0.

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

Reliability Analysis

0 Poor Acceptable Good Excellent

UNACCEPTABLE RELIABILITY

The current dataset produced an internal consistency estimate (Cronbach's α = 0) that falls below commonly accepted psychometric standards. Interpretations should therefore be considered preliminary until additional participant responses are collected and item functioning is further evaluated.

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: 2
Minimum Recommended: 100

Dimension Norms

Dimension Profile Mean SD 50% Concentration Difficulties 70% 14.1 Self-Confidence 60% 28.3 Reduced Appetite 60% 28.3 Guilt and Self-Blame 50% 42.4 Restlessness 50% 42.4 Sleep Difficulties 50% 42.4 Increased Appetite 50% 42.4 Hopelessness and Suicidal Thoughts 40% 56.6 Psychomotor Slowing 40% 56.6 Depressed Mood 30% 14.1 Loss of Interest 30% 14.1 Fatigue and Low Energy 30% 42.4
Dimension Interpretation

The highest scoring dimension in the current sample was Concentration Difficulties (70%). The lowest scoring dimension was Depressed Mood (30%). 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 2 anonymous participant responses collected through voluntary participation. The observed mean score was 46.5 with a standard deviation of 30.41, 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) and kurtosis (0) 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

Major Depression Inventory (MDI). Trait Profiler Interactive Research Dataset. Retrieved from https://traitprofiler.com/major-depression-inventory/statistics/

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