“…First, the observed interference from an incongruent distractor in a second modality may have arisen from listeners' confusion or response interference, rather than from the integration of audiovisual information at the perceptual level. When the target feature to be judged (e.g., whether a sound is moving to the right or left) shares the spatiotemporal properties with visual distractors, such stimulus-response compatibility can cause participants to inadvertently respond to the distractors (Gallace & Spence, 2006;Sanabria, Spence, & SotoFaraco, 2007b;Simon & Berbaum, 1990). In addition to response interference, it is also possible that performance may be affected either by a listener's conscious use of strategies (e.g., selectively attending to a particular spatial region) or by subconscious shifts in their response criterion, referred to as response bias (Alais & Burr, 2004a;Bertelson, 1998;Meyer & Wuerger, 2001;Sanabria et al, 2007a, b;Soto-Faraco, Kingstone & Spence, 2003;Talsma, Senkowski, Soto-Faraco & Woldorff, 2010;Welch & Warren, 1980).…”