Diagrammatic reasoning test where the operator is the unknown

A series item asks what comes next. A matrix asks what fills the hole. A flow asks something structurally different: the unknown is not a term but a function, and the only evidence for it is a handful of cases of that function doing its job. That framing is older than the assessment industry that uses it — a transformation, in the sense Ashby set out in his 1956 Introduction to Cybernetics, is defined by what it does to every operand it can accept, and not by any name attached to it. A lettered box on a graduate assessment is that definition drawn as a picture, and reading one means reconstructing the whole mapping from two instances of it.

That is also why the items here give two examples rather than one, which is the detail most practice material gets wrong. Show a triangle going in and a rotated triangle coming out, and the honest set of hypotheses includes the quarter turn, a rule that flips triangles, and a rule that points every symbol in one particular direction — all consistent with the evidence on offer. A second example on a different symbol kills every hypothesis that was really about the first symbol. Two is the smallest number that makes the item well posed, and any distractor set built on top of a badly posed item punishes people for hypotheses the item never excluded. The three question forms then load different things on purpose: working out a box and using it is inference followed by application, a chain adds an intermediate result that has to be held while the second box is applied, and naming a box removes appearance matching entirely by demonstrating every candidate on symbols other than the one in front of you.

No average exists to put beside fifteen flows, and the reason is worth stating plainly rather than hiding behind a missing table. This page chose its own operators, its own symbol properties and its own distractors, and every one of those choices moves the score; an average produced from them would describe the choices rather than the people who took the run. What the report does instead is internal: which of the six boxes you misread, whether chains cost you more than single boxes, and which of the five named errors your wrong answers were. The timed, mixed-format version of this material sits on the abstract reasoning test, the search that happens before any operator can be applied is isolated on the inductive reasoning test, and the same inference over physical rather than symbolic systems — levers, gears, pulleys — is the mechanical reasoning test. Two neighbours are worth knowing about for the opposite reason: an answer that arrives before any box has been worked out is what the cognitive reflection test is built to catch, and the same wariness about a conclusion that merely sounds like it follows, applied to arguments written in English rather than drawn in boxes, is the critical reasoning page in this set.

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.

Only the three medians on this page carry it at all, and they are reported to a tenth of a second because a flow takes tens of seconds to work. Nothing in the scoring depends on a duration: the counts, the intervals and the box table are all built from which option you picked.

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 an aptitude for technical work, a fit for a particular role, or a difficulty with abstract thought. Only a qualified professional, working with more than a browser, can make that judgment.