a knob on the E-
Meter which
acts as a sort of volume
control. As the sensitivity is turned up, the degree of amplification or magnification of the
needle reactions increases; as it is turned down, it decreases. Setting the sensitivity correctly is important, as if it is
set too low or too high,
needle reactions can be obscured. The
individual is suddenly asked to learn
handling his sensitivity
control and he has been getting along just
dandy watching the
needle of the E-
Meter swing to the
left and
right and now he's all confused about the sensitivity
control.