of visual fixation time as a metric of attentional bias is that it may have higher test-retest reliability than response time in an interference task (Ataya et al., 2012) and that it does not require a motor response (which may be slowed in drug users). While the results from this meta-analysis of functional imaging studies in drug cue exposure are consistent with other data demonstrating longer fixation times to drug related cues, additional studies are needed to determine whether longer fixation times correspond to elevated visual cortex activity in the presence of salient drug cues.
