16Visual features that are associated with a task and those that predict noxious events both prompt 17 selectively heightened visuocortical responses. Conflicting views exist regarding how the 18 competition between a task-related and a threat-related feature is resolved when they co-occur in 19 time and space. Utilizing aversive differential Pavlovian conditioning, we investigated the 20 visuocortical representation of two simultaneously presented, fully overlapping visual stimuli. 21 Stimuli were isoluminant red and green random dot kinematograms (RDKs) which flickered at 22 two tagging frequencies (8.57 Hz, 12 Hz) to elicit distinguishable steady-state visual evoked 23 potentials (ssVEPs). Occasional coherent motion events prompted a motor response or predicted 24 a noxious noise. These events occurred either in the green (task cue), the red (threat cue), or in 25 both RDKs simultaneously. In an initial habituation phase, participants responded to coherent 26 motion of the green RDK with a key press, but no loud noise was presented at any time. Here, 27 selective amplification was seen for the task-relevant (green) RDK, but interference was 28 observed when both RDKs simultaneously showed coherent motion. Upon pairing the threat cue 29 with the noxious noise in the subsequent acquisition phase, the threat cue-evoked ssVEP (red 30 RDK) was also amplified, but this amplification did not interact with amplification of the task 31 cue, and did not alter the behavioral or visuocortical interference effect seen during simultaneous 32 coherent motion. Results demonstrate that although competing feature conjunctions result in 33 interference in visual cortex, the acquisition of a bias towards an individual threat-related feature 34 does not result in additional cost effects. 35 36 37 Cortical competition between task and threat cues 3 Significance statement 38 Selectively perceiving and adaptively responding to cues associated with danger are fundamental 39 functions of the vertebrate brain. In humans, their disruption or dysregulation is at the core of 40 many psychiatric diagnoses, including fear, anxiety, post-traumatic syndromes, and mood 41 disorders. The present study examined the competitive interactions between the prioritization of 42 threat cues and a concurrent cognitive task, to characterize how the human attention system 43 manages limited resources in the presence of threat. Results showed that the selection of an 44 individual feature signaling imminent threat is not at the cost of concurrent attention 45 performance, even when threat and task stimuli overlapped in space. Findings support recent 46 models of emotion/attention interactions that emphasize flexible, feature-based allocation of 47 resources to biologically relevant stimuli. 48 49 Cortical competition between task and threat cues 4 Introduction 50 The visual system receives dense sensory information, continually exceeding the limited 51 capacity of visual cognition. In response to this challenge, the human brain has evolved 52 mechanisms...