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Sample پرسشنامه کاربردپذیری سیستم (SUS)

مقیاس کاربردپذیری سیستم (SUS) جان بروک با ۱۰ سؤال برای ارزیابی نرم‌افزار، سایت یا اپلیکیشن؛ نمره‌ی ۰ تا ۱۰۰ با فرمول استاندارد (گویه‌های فرد و زوج) و سطحِ پذیرش خودکار حساب می‌شود.

10 questions · Free up to 50 responses a month

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About this template

“پرسشنامه کاربردپذیری سیستم (SUS)” has 10 questions; every question is required. Question types: Scale (10).

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Questions in this template

  1. 1.

    فکر می‌کنم دوست دارم از این سامانه زیاد استفاده کنم. *

    (Scale)
  2. 2.

    این سامانه را بی‌دلیل پیچیده یافتم. *

    (Scale)
  3. 3.

    فکر کردم استفاده از این سامانه آسان است. *

    (Scale)
  4. 4.

    فکر می‌کنم برای استفاده از این سامانه به کمکِ یک فردِ فنی نیاز دارم. *

    (Scale)
  5. 5.

    بخش‌ها و کارکردهای مختلفِ این سامانه به‌خوبی با هم یکپارچه بودند. *

    (Scale)
  6. 6.

    فکر کردم ناهماهنگیِ زیادی در این سامانه وجود دارد. *

    (Scale)
  7. 7.

    تصور می‌کنم بیشترِ مردم استفاده از این سامانه را خیلی زود یاد می‌گیرند. *

    (Scale)
  8. 8.

    استفاده از این سامانه را بسیار دست‌وپاگیر یافتم. *

    (Scale)
  9. 9.

    هنگامِ استفاده از این سامانه احساسِ اطمینانِ زیادی داشتم. *

    (Scale)
  10. 10.

    پیش از اینکه بتوانم با این سامانه کار کنم، لازم بود چیزهای زیادی یاد بگیرم. *

    (Scale)

What does the SUS measure?

A user's overall perception of a system's usability — software, a website, an app or even a device. It is short, technology-agnostic and used after usability tests or in user surveys. Five positive and five negative statements alternate.

Number of items
10
Time to complete
1–2 minutes
Score range
0 to 100
Reversed items
2, 4, 6, 8, 10
Response scale
5-point scale from 1 (strongly disagree) to 5 (strongly agree)
Authors
John Brooke, 1996

Scoring the SUS

  1. Odd items (1, 3, 5, 7, 9): the response minus 1.
  2. Even items (2, 4, 6, 8, 10): 5 minus the response.
  3. The sum of these ten numbers (0 to 40) is multiplied by 2.5: a SUS score from 0 to 100.
  4. A SUS score is not a percentage; interpret it against the average of about 68.
  5. You may replace the word "system" with your product's name (e.g. "this app"); keep the rest of each statement unchanged.

Interpreting SUS scores

ScoreLevelSuggested action
Below 50Not acceptable—
50 to below 70MarginalThe average is about 68
70 and aboveAcceptable—

The acceptability ranges come from Bangor, Kortum and Miller (2008). Across roughly 500 studies the average SUS score was about 68 (Sauro, 2011); scores above 68 are above average.

SUS validity and reliability

  • Bangor et al. (2008) analysed more than 2,000 completed SUS questionnaires and reported a Cronbach's alpha of .91.
  • Lewis and Sauro (2009) confirmed high reliability and showed that items 4 and 10 form a "learnability" component.

Using the SUS in your thesis with Porsino

  1. Sign up for free and click "Build a form from this template"; the items, options and every option's score (reversed items included) are ready.
  2. If you need demographic questions (age, gender, education), add them on a separate page; keep the item wording and order unchanged so the scoring stays valid.
  3. Publish the form and send its short link or QR code to your research sample; respondents fill it in without signing up and see their score and its interpretation at the end.
  4. Each respondent's total score and level are saved automatically in separate columns; export to Excel or SPSS from the responses page and go straight to analysis.
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Source and translation

Original instrument: John Brooke, 1996

  • Brooke, J. (1996). SUS: A "quick and dirty" usability scale. In P. W. Jordan, B. Thomas, B. A. Weerdmeester, & I. L. McClelland (Eds.), Usability evaluation in industry (pp. 189–194). Taylor & Francis.
  • Bangor, A., Kortum, P. T., & Miller, J. T. (2008). An empirical evaluation of the System Usability Scale. International Journal of Human–Computer Interaction, 24(6), 574–594.
  • Lewis, J. R., & Sauro, J. (2009). The factor structure of the System Usability Scale. In Human Centered Design (HCD 2009), LNCS 5619 (pp. 94–103). Springer.
  • Sauro, J. (2011). A practical guide to the System Usability Scale. Measuring Usability LLC.

SUS is free to use; just cite the source (Brooke, 1996).

Translated by Porsino; for formal research, cite a validated (normed) Persian version.

Frequently asked questions about the SUS

How is the SUS score calculated?

Subtract 1 from each odd item and subtract each even item from 5; the sum of these ten numbers times 2.5 gives a 0–100 score. This template does it automatically.

What is a good SUS score?

The average is about 68. According to Bangor et al. (2008), 70 and above is acceptable, 50–70 marginal and below 50 not acceptable.

Can I write my product's name instead of "system"?

Yes; replacing "system" with the product name is common and has no meaningful effect on results. Keep the rest of the wording and the order unchanged.

Printable or online?

Printable version (Word & PDF)

  • For filling in on paper, signing and filing by hand
  • Edit the Word file any way you like
  • Collecting and typing up the answers is up to you
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Online version on Porsino

  • Answers are collected and organised automatically — no retyping
  • National ID, mobile number and dates are validated instantly
  • Ready-made reports and charts, plus Excel export in one click
  • Share a link or QR code — it works on mobile too
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How do I use this template?

  1. Sign up for Porsino for free; no bank card needed.
  2. In the panel, open “Templates” and choose “پرسشنامه کاربردپذیری سیستم (SUS)”.
  3. Change the questions as you like, publish the form and send the link.

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