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Multiple Stimulus Types Ambiguity Tolerance Scale-II (MSTAT-II) Test

In 3 minutes, see how comfortable you are with uncertainty and unclear situations. Get fast, practical insights to guide coping skills, communication, and support under stress.
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Questions: 133 minutes
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08:30
October 2, 2025
October 2, 2025
Material has been updated
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How the Scales are Structured
example score
45/91
Tolerance of Ambiguity (ToA)
Measures how comfortable a person is with uncertainty, complexity, and unclear situations without needing rigid structure.
Low tolerance
Moderate tolerance
High tolerance
13 – 41: Low tolerance | 42 – 64: Moderate tolerance | 65 – 91: High tolerance
A score of 45 falls in the Moderate tolerance range, suggesting a generally workable comfort with ambiguity alongside a preference for clarity in some situations.
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DATA-BASED USER COHORTS
Who Usually Takes This Test?
People in major transitions
41%OF USERS
Those changing jobs, moving, starting or ending relationships, or facing health and life uncertainty use it to see how they handle unclear outcomes.
Managers and team leads
34%OF USERS
Leaders take it to understand their comfort with shifting priorities, incomplete information, and fast-changing team situations.
Clients in counseling or coaching
25%OF USERS
People working on anxiety, perfectionism, or control issues use it to spot how much uncertainty triggers stress and rigid planning.
BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.
RESULTS YOU CAN ACTUALLY USE
What You’ll See After You Finish the Test
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Comparison
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Insights
Key patterns you might not notice on your own. Surfacing subtle connections in your responses that help you better understand what may be driving your current results.
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Used in 52+ countries
Benchmarking
See How You Compare
Once you finish the test, your results will be compared with real-world data from people in your country.
Below is a preview of the benchmarks we use to place your score in context.
Tolerance for uncertainty (Tfu)
Average
57.6
Normal range
45.6 — 69.6
min.
13
max.
91
majority
This curve shows how scores are typically distributed.
Once you complete the test, your result will appear here so you can see where you land.
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CLEAR ANSWERS TO COMMON QUESTIONS
Frequently Asked Questions

Any questions left?

What does this scale measure?
It measures comfort with unclear, unpredictable, or unstructured situations. It reflects the tendency to seek certainty versus tolerate ambiguity without distress.
How is the questionnaire completed?
Read each statement and select the level of agreement that best matches typical reactions. Answer all items using the same response scale.
How long does it take and how many items are included?
Completion typically takes about 3 minutes. The questionnaire includes 13 statements.
How should results be interpreted?
Higher scores generally indicate greater tolerance for ambiguity and less need for rigid structure. Lower scores generally indicate a stronger preference for clarity and predictability.
What are common uses in counseling or organizational settings?
Results can inform case formulation, planning coping strategies, and tailoring communication in changing conditions. They may also support discussions about decision-making under uncertainty.
WHAT THE TEST MEASURES
About This Assessment
Tolerance for Ambiguity Scale, MSTAT-II Test

Multiple Stimulus Types Ambiguity Tolerance Scale-II (MSTAT-II) Test

uncertaintytolerance

This self-report measure is used to assess individual differences in tolerance for ambiguity and uncertainty in everyday situations. The Multiple Stimulus Types Ambiguity Tolerance Scale-II (MSTAT-II) provides a brief, standardized way to quantify comfort with unclear, complex, or unpredictable circumstances.

Developed by David J. McLain, it consists of 13 items and typically takes about 3 minutes to complete, using graded response options to indicate level of agreement with each statement. Scores from the Multiple Stimulus Types Ambiguity Tolerance Scale-II (MSTAT-II) may inform case formulation by describing a respondent’s tendency to seek structure and clarity versus remain flexible when information is incomplete, and can be used alongside other clinical data rather than as a standalone diagnostic indicator.

Author: David J. McLain
Literature: Budner, S. Intolerance of ambiguity as a personality variable. Journal of Personality. 1962.; McLain, D. L. Evidence of the properties of an ambiguity tolerance measure: The multiple stimulus types ambiguity tolerance scale-II (MSTAT-II). Psychological Reports. 2009.; Furnham, A., & Marks, J. Tolerance of ambiguity: A review of the recent literature. Psychology. 2013.; McLain, D. L. The MSTAT-I: A new measure of an individual’s tolerance for ambiguity. Educational and Psychological Measurement. 1993.
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