The first age at which performance was significantly lower than the peak scores was 27 – for three tests of reasoning, speed of thought and spatial visualisation.

Thee first age at which performance was significantly lower than the peak scores was 27 – for three tests of reasoning, speed of thought and spatial visualisation.

The research results show that the end-to-end information rate reaches its peak value when sampling interval is near to the mean spatial details of the target, where the image quality is ideal.