Keep the question types separate
TalentLens describes Watson-Glaser as assessing five critical-thinking skills: drawing inferences, recognising assumptions, deducing, interpreting and evaluating arguments. Read the instructions for each type; the standard of support is not identical across every task.
Inference versus deduction
An inference can ask what evidence suggests, while a deductive conclusion must follow under the supplied premises. Do not promote a plausible explanation into a necessary conclusion. Equally, do not reject a necessary conclusion merely because it conflicts with your outside beliefs: the exercise may tell you to accept its premises.
Original worked example: an assumption
A manager proposes replacing printed staff notices with an internal website so everyone can read them. What assumption connects the action and its purpose? Staff need a way to access that website. The argument does not require everyone to prefer reading on a screen. Testing whether the recommendation works without a proposed assumption helps distinguish a necessary bridge from an optional preference.
Evaluate relevant arguments
Assess whether a reason bears directly on the decision. A familiar slogan or an unrelated example can sound convincing without supporting the proposal. For numerical evidence, inspect the sample, comparison group and denominator before accepting a generalisation.
How to practise here
Our critical-thinking lesson and original four-option questions teach the underlying skills. They are not a Watson-Glaser simulation, and our score has no provider percentile equivalence. Use the official practice resource to become familiar with the actual response scales and instructions after studying the methods.
Official source
TalentLens Watson-Glaser overview. Checked 22 October 2026. APTITUDE TESTER is independent, is not endorsed by TalentLens and does not reproduce official items.