The full-length WGCTA is usually 40–80 items

 

The full-length WGCTA is usually 40–80 items depending on the version and covers the five core subscales in more depth:

1. Inference – Drawing conclusions from evidence (typically 16–20 items).
2. Recognition of Assumptions – Identifying unstated assumptions (8–16 items).
3. Deduction – Applying general rules to specific situations (8–16 items).
4. Interpretation – Evaluating conclusions based on evidence (8–16 items).
5. Evaluation of Arguments – Distinguishing strong vs. weak arguments (8–16 items).

Since the full licensed WGCTA is copyrighted, I can’t reproduce it exactly, but I can create a full-length questionnaire inspired by it, suitable for research or practice purposes. Here’s a draft structure for a full-length 40-item version (8 items per subscale) in English:

Watson-Glaser Inspired Critical Thinking Questionnaire – Full Version (40 items)

No	Subscale	Item	Response Options
1	Inference	If all managers are honest, and Mr. Lee is a manager, then Mr. Lee is honest. True or False?	True / False
2	Inference	If a product passes quality inspection, it will be shipped. The product is shipped. Can we conclude it passed inspection? True or False?	True / False
3	Inference	Jane likes all fruits. She eats an apple. Does she like it? True / False	True / False
4	Inference	Some students are late for class. All late students are tired. Therefore, some students are tired. True / False	True / False
5	Inference	Every morning the sun rises in the east. The sun is rising. It must be morning. True / False	True / False
6	Inference	If it rains, the park will be wet. The park is not wet. Therefore, it did not rain. True / False	True / False
7	Inference	All dogs bark. Bella is a dog. Bella barks. True / False	True / False
8	Inference	Some cars are red. All red things are fast. Therefore, some cars are fast. True / False	True / False
9	Recognition of Assumptions	“We should hire more staff because the workload is high.” Assumption: a) More staff will reduce workload b) Workload is irrelevant c) Hiring is always good	a / b / c
10	Recognition of Assumptions	“The company should invest in AI to stay competitive.” Assumption: a) AI improves competitiveness b) Investment is risky c) Competitors do not use AI	a / b / c
11	Recognition of Assumptions	“We need to eat organic food for better health.” Assumption: a) Organic food is healthier b) Eating habits don’t affect health c) Health depends only on exercise	a / b / c
12	Recognition of Assumptions	“Students should attend lectures regularly to succeed.” Assumption: a) Attendance affects success b) Lectures are boring c) Students always succeed	a / b / c
13	Recognition of Assumptions	“The project failed because of poor planning.” Assumption: a) Better planning could have prevented failure b) Failure was unavoidable c) Planning is irrelevant	a / b / c
14	Recognition of Assumptions	“People should save money for emergencies.” Assumption: a) Emergencies can happen b) Saving is pointless c) Emergencies never occur	a / b / c
15	Recognition of Assumptions	“We should reduce screen time for children.” Assumption: a) Less screen time is beneficial b) Screen time is always safe c) Children don’t need rules	a / b / c
16	Recognition of Assumptions	“Team meetings must be held weekly to improve communication.” Assumption: a) Weekly meetings improve communication b) Communication is already effective c) Meetings are wasteful	a / b / c
17	Deduction	All birds have wings. A sparrow is a bird. Can we conclude it has wings? a) Yes b) No c) Cannot tell	a / b / c
18	Deduction	If a student studies, they pass. Tom passed. Did he study? a) Yes b) No c) Cannot tell	a / b / c
19	Deduction	All doctors are educated. Dr. Smith is educated. Is Dr. Smith a doctor? a) Yes b) No c) Cannot tell	a / b / c
20	Deduction	Every cube is a shape. This object is a cube. Is it a shape? a) Yes b) No c) Cannot tell	a / b / c
21	Deduction	If it is snowing, it is cold. It is cold. Does it mean it is snowing? a) Yes b) No c) Cannot tell	a / b / c
22	Deduction	All men are mortal. Socrates is mortal. Is Socrates a man? a) Yes b) No c) Cannot tell	a / b / c
23	Deduction	Every triangle has three sides. This shape has three sides. Is it a triangle? a) Yes b) No c) Cannot tell	a / b / c
24	Deduction	All flowers need water. Roses are flowers. Do roses need water? a) Yes b) No c) Cannot tell	a / b / c
25	Interpretation	A survey shows 90% of participants prefer online learning. Can we conclude online learning is better? a) Yes b) No c) Cannot tell	a / b / c
26	Interpretation	John scored higher than Mary. Can we conclude John is smarter? a) Yes b) No c) Cannot tell	a / b / c
27	Interpretation	If most students like chocolate, should the school cafeteria serve it? a) Yes b) No c) Cannot tell	a / b / c
28	Interpretation	Test scores increased after a new method was applied. Can we conclude the method caused the improvement? a) Yes b) No c) Cannot tell	a / b / c
29	Interpretation	Company profits doubled after marketing changes. Can we conclude marketing changes caused the increase? a) Yes b) No c) Cannot tell	a / b / c
30	Interpretation	A town has fewer accidents after installing traffic lights. Can we conclude the lights caused it? a) Yes b) No c) Cannot tell	a / b / c
31	Interpretation	A medication helped most patients recover. Can we conclude it is effective? a) Yes b) No c) Cannot tell	a / b / c
32	Interpretation	Sales increased when the store extended hours. Can we conclude longer hours caused the increase? a) Yes b) No c) Cannot tell	a / b / c
33	Evaluation of Arguments	“People should exercise because it improves health.” Strong / Weak	Strong / Weak
34	Evaluation of Arguments	“We should cancel the trip because it might rain.” Strong / Weak	Strong / Weak
35	Evaluation of Arguments	“Everyone should use public transport to reduce pollution.” Strong / Weak	Strong / Weak
36	Evaluation of Arguments	“You should buy this phone because it looks cool.” Strong / Weak	Strong / Weak
37	Evaluation of Arguments	“Schools should implement uniforms because it improves discipline.” Strong / Weak	Strong / Weak
38	Evaluation of Arguments	“We should eat organic food because it is expensive.” Strong / Weak	Strong / Weak
39	Evaluation of Arguments	“People should drink water to stay hydrated.” Strong / Weak	Strong / Weak
40	Evaluation of Arguments	“We should plant trees because forests are important.” Strong / Weak	Strong / Weak

✅ Scoring:

• Inference, Deduction, Interpretation → correct/incorrect.
• Recognition of Assumptions → correct assumption identified.
• Evaluation of Arguments → strong vs. weak correctly identified.