Logical reasoning test scored on whether it follows, not whether it is true

Formal logic separates two things that ordinary reading fuses. Whether a conclusion is true is a question about the world; whether it follows is a question about the argument, and the second can be settled without knowing anything about the subject matter. Every assessment built on syllogisms scores the second, and the reason they keep working is that people cannot easily stop answering the first. The finding has a name and a fixed shape: acceptance of a conclusion goes up when the conclusion is believable, whether or not the argument supports it, and the effect is largest exactly where the two come apart. The study that isolated it by crossing validity against believability inside one item set is Evans, Barston & Pollard (1983), On the conflict between logic and belief in syllogistic reasoning, Memory & Cognition, and the sixteen arguments here are built on the same crossing rather than on its items.

What most online reasoning tests do instead is ask arguments whose conclusions are all plausible, which quietly removes the measurement. If every valid argument also ends somewhere true, a visitor who ignores the premises entirely and rates conclusions on general knowledge scores the same as a visitor who reasons — and a score that two completely different procedures produce equally well is not measuring either. The second common failure is subtler: including conflict items but reporting one total, so a person who was perfect on the easy half and lost every conflict item shares a score with someone who was mediocre throughout. Splitting the two halves costs nothing and is the difference between a number and a diagnosis of where the number came from. If you want the same distinction narrowed to one rule applied to one case, with the invalid steps named as you make them, that is the deductive reasoning test; the five-part appraisal that grades inference, assumption, deduction, interpretation and argument evaluation separately is the critical thinking test; and where the wrong answer arrives quickly and feels finished rather than following from any premise at all, that is the cognitive reflection test.

No population figure is printed beside your score, and the reason is worth stating plainly. There is no population norm for 'a verbal reasoning test' or 'a pattern recognition test', because those name a question format rather than an instrument. The score depends entirely on how hard the page made its own items, so any average quoted would describe this page's difficulty setting and nothing about people. The commercial tests in these formats do have norms, and those are restricted — see the hiring-assessment entry. The commercial tests written in this format do carry norms, and those norms belong to their publishers and were collected under a stopwatch with an item bank nobody else may use. So what this page reports is a count, an interval around it, the probability of that count arriving by chance, and a within-visitor difference between two matched halves — all four of which are meaningful without any comparison group at all. For the same judgment applied to short passages, where the third response option means the passage is silent rather than that the claim is false, the verbal reasoning test is the closer format, and for reasoning with no sentences in it at all, the matrices page removes language from the path entirely.

A reaction time here is the interval between the frame that painted the stimulus and the timestamp the browser attached to your key, both read from the same monotonic clock. What neither can see is the display pipeline behind it, so on a 60 Hz screen roughly 16 ms of every figure below is the machine rather than you. That is the timing floor: two numbers closer together than that are the same number, and this page reports no precision it cannot support.

Nothing on this page is scored on speed, so that floor is nowhere near large enough to matter to it: the durations printed beside the two halves run to seconds, and they are shown to a tenth of a second rather than to the millisecond for exactly that reason. It is stated because the clock is the same one every timed page here uses, and because a number is only as good as the account of where it came from.

This is a measurement exercise, not a clinical assessment. It reports what you did on this page against a stated reference and nothing more — it cannot establish a reasoning impairment, a learning difficulty, or how sound your judgment is outside these sixteen arguments. Only a qualified professional, working with more than a browser, can make that judgment.