and readiness to act which are left hemisphere attributes.

 Specifically, passivity and involvement in perceptual

 judgement relates to RH activation, whereas overt responses

 or covert response planning is associated with left

 hemisphere activation.

 Davidson and his colleagues (Fox and Davidson,1984;

 Davidson, 1985; Davidson et al., 1990) proposed a similar

 theory. They purported that the behavioral dimension of

 approach-withdrawal is the organizing dimension for

 hemispheric specialization in that the right hemisphere is

 specialized for withdrawal emotions such as disgust, whereas

 the left hemisphere is specialized for approach emotions

 such as interest. In addition, Davidson (1985) postulated

 there are reciprocal relations between the frontal and

 parietal lobes. Specifically, left frontal activation is

 balanced by right parietal activation and vice versa. For

 example, he stated that spatial cognition (right parietal)

 and positive affect (left frontal) are more likely to occur

 concurrently than verbal cognition (left parietal) and

 positive affect.

 Heller (1990) posited a similar view. She asserted

that the right hemisphere may be specialized for

interpretation of emotion, but not specialized for the

regulation of mood. Heller also emphasized the importance

of distinguishing between the functions of the anterior and

posterior regions of the brain, citing evidence that the