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Three studies investigated whether individuals preferentially allocate attention to the spatial location of threatening faces presented outside awareness. Pairs of face stimuli were briefly displayed and masked in a modified version of the dot-probe task. Each face pair consisted of an emotional (threat or happy) and neutral face. The hypothesis that preattentive processing of threat results in attention being oriented towards its location was supported in Experiments 1 and 3. In both studies, this effect was most apparent in the left visual field, suggestive of right hemisphere involvement. However, in Experiment 2 where awareness of the faces was less restricted (i.e. marginal threshold conditions), preattentive capture of attention by threat was not evident. There was evidence from Experiment 3 that the tendency to orient attention towards masked threat faces was greater in high than low trait anxious individuals.
Mogg et al. (Fri,) studied this question.