Everything You Need to Know

Initially developed by Goodwin Watson and Edward Glaser, The Watson Glaser Critical Thinking Appraisal Test (WGCTA) understands and measures a candidate’s critical thinking skills. It’s a simple test that allows an employer to evaluate the candidate’s ability to recognize assumptions, assess arguments and draw conclusions based on those assumptions.

Critical thinking is considered a crucial factor because candidates who have it are often good decision-makers and arrive at informed, precise, and objective conclusions instantly. Solid decision making, problem-solving skills, and strategic thinking set the foundation for a successful candidate, organizations use these to screen and hire talented people.


Watson Glaser – an international test

The Watson Glaser Critical Thinking Appraisal Test was published by the Pearson’s Clinical Assessment Group, an international company with offices in 14 countries. The test that features critical reasoning questions, is available in tens of languages and countries around the world including United States, United Kingdom, and Canada. The test is identical no matter the geography.

The test is available both without a time limit and a 30-minute timed version. Both versions consist of 40 questions divided into five sections. To pass the test, you need to have strong problem solving and analytical skills, and should be able to find a quick solution after examining all aspects of a problem. Critical Thinking Tests or Critical Reasoning Tests, such as the Watson Glaser, are mostly used as one of the factors for hiring graduates, professionals, and managerial staff.

In the timed version, you will be given only 30 minutes to complete the Watson Glaser Test of 40 questions.

Many legal firms and banks use this logical thinking test as a part of their selection process for ensuring they have only the most talented people on board. Available in English, French, Dutch, and Spanish, candidates can either take the test online or can make use of the pen-paper format.

Critical thinking can be defined as one’s ability to rationally or logically think about a particular problem. It is also defined as the ability to process information from different sources reasonably and creatively. Companies utilize this test to hire strong, dedicated employees who will go on to become future leaders. An employee’s ability to effectively use information and make the right decision will ensure passing the test.

Free Practice

Test Features

Reliable & trusted

The test is internationally recognized, it is a scientifically-reliable and trusted by many companies as a primary tool to assess the candidate’s skills.


Although you have the ability to take the test online, you can also use the pen-paper format to take the test.

Language availability

The test is available in many different languages: English, Spanish, Dutch, and French. This means you will not encounter a language barrier while taking the test.


Watson Glaser believes that it is essential for employee assessment to analyze and make decisions under pressure, which is why the test is timed. In the timed version, you will only have 30 minutes to complete the test.

100% Certified

Many established organizations like law firms, information technology organizations, and other companies use this test to bring critical thinkers on board.

Easy to administer

There are 40 questions you need to complete in the time allotted. The questions are multiple choice – there will be a number of available options, and you need to correctly choose the right answer.

Technical Facts

The Watson-Glaser Thinking Appraisal Test (WGCTA) measures critical skills that are important for having well-reasoned, structured and talented people on board. The test will measure one’s ability to:

  • Recognize assumptions
  • Make deductions
  • Make correct inferences
  • Interpret and evaluate arguments
  • Come to conclusions

The RED model for critical thinking

The Watson Glaser test works according to the RED model, i.e.:

  • Recognize Assumptions: This test is all about understanding what the question states and analyzing whether the info mentioned is correct, or whether there’s any evidence that backs the stated information.
  • Evaluate Arguments: Evaluating arguments means logically working with a problem and critically evaluating it. It is about symmetrically analyzing the argument and the evidence provided.
  • Draw Conclusions: Candidates need to come to a logical conclusion based on the evidence provided. A candidate with strong critical thinking skills will be able to draw conclusions that would then lead to another conclusion.

What will the Watson Glaser Test measure?

The test will assess the critical thinking abilities of a candidate in five areas:

  • Inferences
  • Assumptions
  • Deductions
  • Interpretations
  • Evaluation of arguments

How many questions will be there?

There will be 40 multiple choice questions that you need to complete in only 30 minutes in the timed version.

A mix of questions

The test evaluates the candidate’s critical thinking ability in five different areas, and candidates will be assessed on each area individually. Hence, the questionnaire includes 40 questions in five different sections.

Is the test online or offline?

While the test is online, you can also take this using paper-and-pencil format.

Results Scale and Interpretations

You will be assessed and scored on three skill areas of the RED model:

  • Your ability to Recognize Assumptions
  • Your ability to Evaluate Arguments
  • Your ability to Draw conclusions

Recognize Assumptions

Candidates with skilled behavior in the area will identify what is being taken for granted, and explore diverse viewpoints on the subject. Identifying the assumptions will help you reveal information gaps and enhance your understanding of the subject.

If you scored ‘Strength To Leverage’ in this skill area, it means you possess strong skills in recognizing assumptions.

Evaluate Arguments

Candidates who can objectively and accurately evaluate arguments are likely to be hired by many organizations. Such candidates can overcome confirmation-bias and also possess the capability to analyze an argument’s reasoning and supporting evidence, and explore counter-arguments even when doing so is controversial. When evaluating controversial arguments, emotions can play a negative role, as they can cloud your evaluation capabilities.

If you scored ‘Further Exploration’ in this parameter it means that your skills are average when compared to other candidates.

Draw Conclusions

Drawing conclusions mean reaching the conclusion which logically follows the evidence available for a particular problem. Furthermore, reaching a conclusion means evaluating information from diverse sources, and even changing your position on a subject when warranted by the available evidence.

Employer’s scorecard

The employer’s scorecard will include the following scores:

  • Percentile – your percentile position within your peer group
  • Stanine – your score on a nine-point scale (1-9)
  • Raw Score – the number of correct answers (out of 40)

For instance, here’s a candidate’s sample score in measuring overall critical thinking

Note: there is no penalty for guessing an answer nor for a wrong answer.


The Watson Glaser test is administered in five different sections:

  1. Assumptions: In this section, you will encounter assumptions based questions.
  2. Analyzing arguments: To examine arguments, you will have to assess whether the provided statement is strong or weak.
  3. Deductions: You will be asked to make deductions using the information from the passage. Given a few proposed conclusions, you will be asked to decide for each if it: ‘follows’, or does not ‘follow’ the passage’s logic.
  4. Inferences: In this section, you will be provided with a list of possible inferences which you will be asked to rate as true or false.
  5. Interpreting information: In this section, you will need to interpret information from the questions to decide if each conclusion is based on the given information or not. Your answer should be based solely on the provided information and not on prior knowledge which may mislead you.

Free Practice

Test Provider

The Watson Glaser test is the property of the Pearson’s Clinical Assessment Group. With more than 80 years of experience in the assessment field, Pearson’s Clinical Assessment group offers innovative and comprehensive products and services. Some of the company’s brands include the Wechsler and Kaufman families of products, MMPI, BASC, OLSAT, CELF, and PLS.

The Pearson’s Clinical Assessment Group serves 300,000 customers in the U.S. with assessments for psychologists, speech-language, pathologists, occupational therapists, and related professionals. They have over 700 employees worldwide.

Disclaimer – All the information and prep materials on iPrep are genuine and were created for tutoring purposes. iPrep is not affiliated with Pearson’s Clinical Assessment Group, which is the owner of the Watson Glaser test.

About this Course

(39 Ratings)

Welcome to iPrep’s Watson Glaser Critical Thinking Appraisal (WGCTA) Course.

This course will help you boost your skills and with it your confidence towards your upcoming Watson Glaser test. The course will provide you with the following tools and benefits:

  • You will become familiar with all of Watson Glaser’s five types of questions – Inference, Recognition of Assumptions, Deductions, Interpretations, and Evaluation of Arguments.
  • You will be given two full-length 40-question Watson-Glaser-style simulation tests. These simulations include similar questions to those you will encounter in the real test with the same level of difficulty. They also have the same estimated time limit as the real test. Experiencing the test’s time pressure will ensure it will not come as a surprise on test day.
  • You will be provided with a great variety of helpful tips for the different types of questions. Some of the tips are in the guidance sections and additional ones in the detailed explanations that follow each question.

14 Learning Hours3+5 Practice Tests206 Questions30 Day Access

By the end of this course, you will be more knowledgeable and comfortable with the Watson Glaser Test – Knowledge and familiarity with the test are the two most significant factors that can help you maximize your score and improve your chances of success.

The course is comprised of two parts – guidance and the test simulations. In the guidance section, we will review each type of question, its purpose, and its underlying logical mechanism. You will also have a chance to practice several test-level questions before approaching the test simulation to get a feel for the challenge ahead.

Afterward, you will proceed to the simulation of full-length tests that accurately follow the structure and concepts of the Watson Glaser. Once done, you will be able to get full question explanations and even see how well you performed in comparison with other people who have taken the test.

Wishing you an enjoyable learning experience!


Skills You Will Learn

Recognition of AssumptionsEvaluation of ArgumentsDrawing Conclusions



  1. Course Introduction
  2. Question Types Guidance
  3. Full-Length Watson-Glaser-Style Simulations
  4. Course Conclusion



Dr. Roy van den Brink-Budgen

Co-founder and Director of Studies of the Centre for Critical Thinking

Dr. Roy van den Brink-Budgen has been working in the field of critical thinking for over thirty years. His experience has included the development of various assessments in critical thinking, and teaching the subject to a wide range of groups (students from primary to postgraduate, teachers from primary to college, juvenile offenders, and business managers). He has also written seven books on the subject, many journal articles, and online courses for secondary students and MBA students (as well as having produced a critical thinking card game). He has given presentations to various international conferences on critical thinking and creative thinking.

His work in critical thinking has taken him to many countries (including France, India, Malaysia, New Zealand, Spain, the UK, and Singapore – where he is the Director of Studies at the Centre for Critical Thinking). He serves as a consultant on critical thinking to PocketConfidant, an international company that is developing AI for personal coaching. In addition, he runs a company that provides various services in critical thinking – if…then ltd – based in the UK.


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(39 Ratings)
  1. Lori R***
      September 1, 2019 at 5:48 PM

    This has been very helpful in understanding the parts of the test and preparing for the assessment

  2. Janina K******
      August 25, 2019 at 7:27 PM

    Good prep and range of questions. The explanations are helpful. The practice tests were very helpful and numerous.

  3. Christopher B*****
      July 27, 2019 at 8:52 PM

    This has been a helpful and confidence-building primer for this test. The explanations were thorough and compelled me to carefully consider each statement.

  4. Dimitrios C***************
      July 25, 2019 at 10:12 PM

    This is a comprehensive and carefully prepared preparation material for the WG-CTA developed by a leading author in the field of critical thinking. Areas of improvement include the following: (1) add a diagnostic test to provide a baseline level of competence thereby allowing participants to identify weak areas early in their preparation and use this knowledge to better target their learning; (2) the theory provided in the “question types guidance” can be significantly strengthened with more explanation, techniques, and tips. In particular, the assumptions section could be expanded to include important topics such as the difference between necessary and sufficient assumptions (some times a provided sufficient but not necessary assumption serves as a challenging wrong option), and types of necessary assumptions apart from missing inferential links (e.g. presumptions and overlooked possibilities); (3) more challenging questions need to be added to match the difficulty of the real test.

  5. John W******
      July 24, 2019 at 10:23 PM

    Excellent review for the test. Really easy to follow, with good explanations. practice is key.

  6. Teresa O******
      July 24, 2019 at 8:04 PM

    The information in the materials is not fully correct. They do give you all 5 inferences to chose from and not the 3 the iprep suggests. Also, the test automatically pauses in-between each of the 5 sections but does not allow you to jump back and forth between sections. I have a few minutes left and wanted to review some of the assumptions and it would not allow me. The order they do these practice tests and number of questions is correct. Questions I was given were much harder than the prep. However, without this course I would have surely failed this test.

  7. Oleg P****
      July 16, 2019 at 3:50 AM

    I think the questions and explanations are very good. However, there are times that I try to apply the concept I learned from one question to another question and somehow get it wrong.

    1.   July 16, 2019 at 6:19 AM

      Hi Oleg,

      Thank you for your kind words. We are here to help if you feel you need it. Just send us a detailed email, and our experts will get back to you. Good luck on your test!

  8. John N****
      July 13, 2019 at 5:06 PM

    It’s great! Very realistic! The walk through and specifics about how to answer the questions are helpful.

  9. paul m*****
      July 4, 2019 at 2:45 AM

    This course really helps you to understand the structure of questions and how to approach the test. While some of the answers are a bit nebulous, you come away with a much higher level of confidence.

  10. Cheryl Y**
      June 29, 2019 at 3:53 PM

    Very thorough guides and explanations. I appreciate the structure of the iPrep course, which I find to be unmatched by any other provider. How the guides and practice tests are organised into a course is very helpful and gives me a sense of finality once I’ve completed it. I also found that the step-by-step structure made it very easy to keep track of my progress. The course could, however, be improved if there was at least one more practice test, especially considering the price charged.

    1.   June 30, 2019 at 4:45 AM

      Thank you Cheryl for the kind words. One more practice test is in the works and will be included soon.

  11. R S
      June 25, 2019 at 9:47 PM

    Overall, Worthwhile to invest the time as it highlighted some explanation and then several practice samples–already see a benefit even before trying the Practices Tests. Thanks!

  12. Russell Q*******
      June 25, 2019 at 6:02 PM

    Very helpful in getting the feel of the questions. It prepares you for the actual test by giving you a more secure feeling of how to answer.

  13. Hemani B*********
      June 25, 2019 at 12:17 AM

    iPrep has been a really useful website in assisting me to prepare for the Glaser test.

  14. Carl L*****
      June 23, 2019 at 5:34 PM

    Excellent tips and good practice questions. I would recommend.
    The tips were things that were very practical and made the tests very accessible. Thank you.

  15. Mark K**
      June 21, 2019 at 8:25 PM

    This material has really helped my preparation for the Watson Glaser and provided useful tips for people preparing for the first time.

  16. Joanne L**
      June 19, 2019 at 11:12 PM

    Explanations are thorough and supported by examples to help you differentiate right from wrong. There is also a broad variety of practice questions available.

  17. Daisy D**
      June 19, 2019 at 1:40 PM

    the course is good and helpful as tester course, lot to practice and learn for the test

  18. Michael S******
      June 19, 2019 at 2:52 AM

    I think this preparation course is well structured with some training, some practice exams, and practical test taking. This has been very valuable for me as I prepared with a job test.

  19. Ken M**************
      June 18, 2019 at 8:11 PM

    Awesome way to prep for a course, gives plenty of explanations and practice test examples

  20. Dagmar P**
      June 18, 2019 at 12:06 PM

    Good test, helps to prepare for an assessment and good explanation of why answers are right or wrong

  21. Sarah M*******
      June 18, 2019 at 9:09 AM

    This course is helpful preparation, I’m hopeful it will help in passing my assessment, fingers crossed!

  22. Harshad D****
      June 15, 2019 at 9:15 PM

    Excellent prep material for applications to jobs. This helped me tremendously to achieve my objective

  23. Dea F*****
      June 14, 2019 at 5:22 AM

    very helpful and it gives us free extension too. Thank you!

  24. M R
      June 13, 2019 at 8:42 PM

    Really really useful, thanks for the help! It was really comprehensive!

  25. William M*******
      June 13, 2019 at 11:12 AM

    Excellent Course, vert thorough, clear, concise and to the point

  26. MONICA T*****
      June 13, 2019 at 9:56 AM

    It is great for the preparation of the interviews. It also presents with all the explanation.

  27. kim n******
      June 12, 2019 at 9:14 PM

    This has been so helpful and Amazing. Concepts are clearly explained and the practice tests are great in sliding the lessons!

  28. Mike W******
      June 12, 2019 at 12:37 PM

    I am 100% sure that working through the examples & reading the explanations provided by iPrep has improved my scores!

  29. kalpana b
      June 12, 2019 at 10:45 AM

    I can say this is the best course learning platform online by providing real world examples and practice tests with good solutions .

  30. Richard K***
      June 11, 2019 at 10:41 PM

    Excellent material. Good sample questions that challenged me. A nice resource to prepare for a special project.

  31. Claudia B******
      June 10, 2019 at 12:03 AM

    Great preparation! This course really helps to explain the different categories and how to analyze them!

  32. chelsey n****
      June 9, 2019 at 2:23 PM

    There are really helpful explanations and sufficient questions to practice on

  33. Marvin C********
      June 9, 2019 at 5:26 AM

    Awesome stuff.

    Great explanation. Substantial attention to details. equipped with strategies to answer quickly.

  34. DuWayne J*****
      June 8, 2019 at 3:57 PM

    The test thoroughly explains the rationale for the correct responses.

  35. Sanchez L*
      June 7, 2019 at 3:32 AM

    Good range of questions and statements. The explanations in the answers were also helpful.

  36. Maja M*********
      June 5, 2019 at 6:54 PM

    Very good course on WGCT test, with explenations and test. Highly recommended!

  37. Lorne B****
      June 4, 2019 at 10:38 PM

    This course is well throughout and was very helpful! I would definitely recommend it to others.

  38. Michelle W***
      June 2, 2019 at 1:24 PM

    Great preparation and online help. Questions were applicable and explanations of answers were helpful.

  39. Teboho M*******
      June 1, 2019 at 11:35 PM

    Very helpful. I now feel confident to take the Waston Glaser Test next week. Thank you iPrep team

  40. Luke T****
      May 29, 2019 at 9:10 PM

    The Watson Glaser test prep was incredibly helpful. Provided a thorough breakdown of each type of question, plenty of practise questions then a fully timed practise test at the end.

Get to know what the Watson Glaser Critical Thinking Appraisal Test (WGCTA) will be like by practicing with these sample questions: