chevvron,
that sounds like one of the tests I was given at Aviation House in 1978. There was a 'speed and accuracy test', which involved looking for identical symbols in a grid. The other test was similar to what you have just described. It was 3 boxes per question, each with a pattern of moving 'blips', but one of them was moving in a different direction to all the others. We had to identify it. Fortunately an interest in astronomy helped-out. It was like looking at 3 overlapping pictures of the constellations, and trying to spot the artificial satellite.