The availability of attentional resources modulates the anger superiority effect.

It is much debated whether there is an anger superiority effect (ASE) in the recognition of facial expressions. Recent research has shown that the attentional demand of a task plays a vital role in the emergence and magnitude of the ASE. However, only a visual crowding task was employed to manipulate attentional demands, and it is unclear whether the emergence and magnitude of the ASE was contingent on the availability of attentional resources in general. The present study employed a dual-task paradigm to manipulate the availability of attentional resources for facial expression discrimination in which participants were instructed to perform a central letter discrimination task and a peripheral facial expression discrimination task concurrently. Experiment 1 showed an ASE in the dual task but no ASE was yielded when the facial expression discrimination task was performed alone. Experiment 2 replicated this finding and further demonstrated a gradual shift from no ASE to an attenuated ASE and finally to a strong ASE as attentional resources that were available for facial expression discrimination gradually became limited. Together, these results suggest that the emergence and magnitude of the ASE is modulated by the availability of attentional resources, which supports an Attentional Demands Modulation Hypothesis of the ASE.