no shock (or reward) would be presented. During these 5-

minute anticipatory intervals, subjects were administered

brief mood questionnaires (i.e., Positive and Negative

Affect Schedule and Self-Assessment Manikin).

 The use of the 5-minute paradigm in Experiment 2 is

more suitable for obtaining self-report information, whereas

the use of 6-second two-stimulus paradigm in Experiment 1 is

more suitable for obtaining reliable brief

psychophysiological indices of emotion.

 Hypotheses and Predictions

Overall Hypotheses

 According to the global right hemisphere model, emotion

is modulated predominantly by the right hemisphere.

Consequently, the global model hypothesizes that patients

with RHD will display attenuated responsivity, relative to

the LHD group, across all three response domains (arousal,

facial, and verbal report) in both negative and positive

emotion-evoking situations.

 In contrast, the bivalent model posits that

positive/approach emotions are mediated by the left

hemisphere and negative/avoidance emotions are mediated by

the right hemisphere. According to the bivalent model, the

responses of the RHD and LHD patients would vary as a

function of valence (positive-negative nature) of the

induced emotion. Specifically, the RHD group would show

diminished responses in all three response domains (arousal,