Abstract: Three items of CNV were performed on fourteen subjects aged 19-22.The items are as follows: Usual CNV (U.CNV) , Nonmotor CNV (Nm.CNV) and Half-probability CNV (Hp. CNV). It is observed that. (1)The late section and full CNV of U.CNV amplitude are larger than Nm.CNV, the difference of the late section is the largest, and the differencewave between U.CNV and Nm. CNV is the component of conation thatisa pure psycho-genous wave and is the Readiness Potential of Kornhuber etal. in CNV; (2)The early section and full CNV of Hp. CNV amplitudeare larger than U. CNV; (3)The early section, late section and full CNVamplitude of Hp, CNV are larger than Nm. CNV. These results sugg-est that the conation is a psychological factor in CNV; the Readiness Po-tential is a component of CNV. This experimental result is a new directevidence of the latest view that CNV is a composite wave.

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