Inhibitory attentional control under cognitive load in social anxiety: An investigation using a novel dual-task paradigm.

Research suggests that socially anxious (SA) individuals exhibit poorer attentional inhibition than their non-anxious (NA) counterparts. Attentional control theory presumes that cognitive load worsens the adverse effects of anxiety on attentional inhibition. However, previous studies examined the effects of cognitive load on attentional inhibition in social anxiety yielded inconsistent results. In this study, cognitive load was manipulated by adding a 1-back (low cognitive load) and 2-back task (high cognitive load) to the emotional antisaccade task, investigating the effects of cognitive load on attentional inhibition in the presence of social evaluative stimuli in SA and NA individuals. Results revealed that cognitive load improved the efficiency but impeded the effectiveness of inhibitory attentional control in SA participants. Under high cognitive load, SA participants made more erroneous saccades for threat-related than nonthreat-related faces while NA participants showed no differences in error rates among different face types. Moreover, regardless of cognitive levels, SA participants had shorter saccade latencies for angry faces than happy and neutral faces. NA participants did not show differences in saccade latencies among different face types. Implications of these findings for understanding the role that cognitive load plays in the processes of attentional control and interventions for social anxiety are discussed.