In 1938, the British psychologist John C. Raven (1902-1970) published this set of drawings “for measuring intelligence in subjects of all mental ages above 3 years.” The test consists of sixty pages ...

A switching matrix used in a test system connects a signal on a particular column to an instrument on a certain row. Typically, there are more signals than instruments, so several voltage measurements ...

This is a preview. Log in through your library . Abstract Invariant tests of the hypothesis that Σ1 = Σ2 are based on the characteristic roots of S1S -1 2, say c1 ≥ c2 ≥ ⋯ ≥ cp, where Σ1 and Σ2 and S1 ...