[填空题]
Controlling Your Concentration
Ⅰ.The concerned information of concentration
A.Your attention span
(1) e.g. the ticking of a watch sounds
as if it increases and fades
although the intensity of it is constant
B.You pay attention to one thing at a time
—a(n)
(2) : you attend to several concepts at a time
—In high concentration: the shift from focus of attention is
a) of short
(3) b) relatively infrequent
C.
(4) of your attention vary to different degrees
—high level: long periods of attending; short distraction periods
—low level: short periods of attending; long distraction periods
—moderate level: a mixture of two extremes
e.g. One can’t concentrate because
(5) are too strong
Ⅱ.Two sorts of distractors
A.Psychological distractors