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Acute Mental Fatigue Assessment Questionnaire

Acute Mental Fatigue Assessment Questionnaire Test

Understand your mental fatigue and focus during the day in about 4 minutes. 18 quick items support safer decisions, fewer errors, and sustained performance in high-demand work.

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Questions: 184 minutes

Hi! My name is Freudly, i am an AI therapist, I will give you an interpretation of the test after you complete it.

08:30

October 2, 2025

October 2, 2025
Material has been updated

October 2, 2025
Material has been published

15,448 views

1,409 completions

1,206 likes

Verified by Daniel Hall

Psychologist with 25 years of experience

Scale Explorer

How the Scales are Structured

example score

10/16

Scale 2 (S2)

Assesses disruptions in self-regulatory processes that support sustained activity and can be associated with mental fatigue.

Low disruption

Moderate disruption

High disruption

0 – 5: Low disruption | 6 – 11: Moderate disruption | 12 – 16: High disruption

A score of 10 falls in the Moderate disruption range, suggesting noticeable strain in regulatory processes that may reduce efficiency during sustained mental work.

example score

9/20

Scale 1 (S1)

Measures decreased performance and cognitive discomfort associated with acute mental fatigue.

Low

Moderate

High

0 – 6: Low | 7 – 13: Moderate | 14 – 20: High

A score of 9 falls in the Moderate range, suggesting noticeable mental fatigue with some reduction in concentration and efficiency.

example score

20/36

Mental Fatigue Index (MFI)

Measures the severity of acute mental fatigue affecting concentration and cognitive efficiency during information-intensive activity.

None–Mild

Moderate

Severe

0 – 16: None–Mild | 17 – 28: Moderate | 29 – 36: Severe

A score of 20 falls in the Moderate range, indicating a noticeable level of mental fatigue that may reduce sustained attention and mental efficiency.

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DATA-BASED USER COHORTS

Who Usually Takes This Test?

Office and knowledge workers

41%OF USERS

People who spend hours on emails, documents, and meetings use it to check whether mental strain is reducing focus and productivity during the day.

Operators and dispatch staff

34%OF USERS

Roles that require sustained attention and rapid decisions take it to spot fatigue that could increase errors or slow reaction time.

Students and exam takers

25%OF USERS

Learners use it to see how studying and information overload are affecting concentration and recovery after intense mental effort.

BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.

RESULTS YOU CAN ACTUALLY USE

Scale Results
— Explained Clearly

Your scores across each test scale are translated into plain, usable insights. You won’t just get numbers — you’ll learn how your results impact your daily life, emotional state, and overall well-being.

AI-Powered
Interpretation

You’ll receive a structured, clinically-grounded explanation. Our AI analyzes patterns and relationships between scales to provide a coherent interpretation, without exaggerated language.

Statistical
Comparison

See how your results compare to others. Anonymized platform data is used to create a percentile scale, which identifies whether your results are typical.

Practical
Recommendations

You’ll receive clear, actionable guidance tailored to your profile. These easy-to-implement suggestions focus on coping, self-regulation, and realistic next steps.

AI-Powered
Insights

Get insights on behavioral and thought patterns you might not notice on your own. By uncovering subtle connections between your responses, you’ll better understand what may be driving your current results.

Discuss with
an AI Therapist

Clarify, reflect, and explore your results right away. Talk through your experience, ask questions, and explore meanings in a calm, non-diagnostic dialogue.

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Used in 52+ countries

Benchmarking

See How You Compare

Once you complete the test, your results are compared with real-world data from people in your country.
Below is a preview of how scores are typically distributed across each scale.

Scale 2 (S2)

Average

7.8

Normal range

5.6 — 9.9

min.

max.

Majority

This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.

Scale 1 (S1)

Average

6.8

Normal range

3.4 — 10.1

min.

max.

Majority

This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.

Mental Fatigue Index (MFI)

Average

14.4

Normal range

9 — 19.9

min.

max.

Majority

This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.

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CLEAR ANSWERS TO COMMON QUESTIONS

Frequently Asked Questions

What does this questionnaire measure?

It screens for acute mental fatigue during the workday. Items focus on reduced concentration, mental strain, slowed thinking, and difficulty recovering after mental effort.

Who is this questionnaire intended for?

It is intended for adults who perform sustained attention or rapid information processing tasks. It is suitable for office, computer-based, monitoring, dispatch, and academic settings.

How long does it take, and how many items are included?

Completion time is approximately 4 minutes. The questionnaire contains 18 items.

How should responses be selected?

Answer each item based on the most recent period of work or study, typically the current day. Select the response that best matches the current state rather than a usual or preferred state.

How are results typically used?

Scores provide an estimate of current mental fatigue level and potential impact on cognitive performance. Results may be reviewed alongside physical fatigue indicators to inform workload adjustments and error-risk prevention.

WHAT THE TEST MEASURES

About This Assessment

Acute Mental Fatigue Assessment Questionnaire Test - Symptoms and Signs

fatigue

During sustained cognitive demands, individuals may experience transient reductions in attention, efficiency, and mental stamina. The Acute Mental Fatigue Assessment Questionnaire is a brief self-report measure designed to capture perceived acute mental fatigue in contexts that require sustained information processing and rapid responding.

The instrument includes 18 items and typically requires about 4 minutes to complete. It is intended to provide a structured snapshot of current subjective mental fatigue and related functional impact (e.g., concentration strain and perceived decrease in effectiveness) and may be used in occupational, academic, or other high-demand settings. The Acute Mental Fatigue Assessment Questionnaire was developed by David M. Dinges and can be considered alongside other clinical or performance-related indicators when evaluating fatigue-related risk or monitoring change over time.

Author: David M. Dinges

Literature: Hockey, G. R. J. Cognitive-energetical control mechanisms in the management of work demands and psychological health. In A. D. Baddeley & L. Weiskrantz (Eds.), Attention: Selection, awareness, and control. Oxford University Press. 1993.

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