Predictability of salient distractor increases top-down control in healthy younger and older adults

Abstract

Younger adults are able to shield attentional selection against distractors when they have preknowledge about the upcoming distractor location. For older adults, who suffer from an overall decrease in attentional capacity and who are, in addition, particularly prone to attentional capture, such an adaptive shielding ability would be of particular importance.However, it is an open question whether healthy older adults can utilise the predictability of distractor locations to improve top-down controlled selection to the same degree as younger adults. The theory of visual attention (TVA) framework provides a systematic way to measure an individual's efficiency of top-down control. The present study combined a TVA-based partial-report paradigm with abrupt-onset cues rendering the indicated location highly salient in a bottom-up fashion. Experiment 1, in which (on cued trials) the cue was invariably followed by a distractor at the cued location, showed that the cueing increased the weight of the distractor in the competition for selection compared to uncued distractors (on trials without a cue). In Experiment 2, the probability with which the abrupt-onset cue indicated the upcoming distractor location (1/3 vs. 2/3 of trials) was manipulated between experimental blocks. Participants were able to learn these statistical contingencies and exert top-down control more efficiently in blocks with highly valid distractor location cues, as compared to low-validity blocks. This finding suggests that, even though abrupt-onset spatial cues increase the attentional weights of distractors, participants can acquire and use pre-knowledge about the likelihood that a distractor will appear at an indicated location to down-weight the bottomup attentional-capture signal. This ability turned out to be comparable across age groups, suggesting that efficient use of predictive information to shield against distracting information is preserved in normal ageing.

Evidence for an age-related decline in feature-based attention

“…This is supported by studies reporting that older adults have more difficulties in locating a target among distracters than young adults (Hommel, Li, & Li, 2004;Kramer, Hahn, Irwin, & Theeuwes, 2000;Phillips & Takeda, 2010). In contrast, other studies found that cueing the target location reduces the attentional capture of distracters to a similar extent in young and older adults (Gottlob & Madden, 1998;Hartley, Kieley, & Slabach, 1990;Haupt, Napiórkowski, Sorg, Müller, & Finke, 2019;Madden, Whiting, Cabeza, & Huettel, 2004). The latter evidence offers a more nuanced perspective by highlighting that older adults are impaired when relying solely on bottom-up attention, or when exceeding the limit to recruit additional topdown resources to compensate for declines in sensory regions (Cabeza, 2002;Grady et al, 1994;Madden et al, 2007;Park & Reuter-Lorenz, 2009;Reuter-Lorenz & Cappell, 2008;Reuter-Lorenz & Lustig, 2005;Stern, 2002;Talsma, Kok, & Ridderinkhof, 2006;Whiting, Madden, & Babcock, 2007).…”