Flexibility of cognitive control is illustrated by the context-specific proportion compatibility (CSPC) effect, the now well-documented pattern showing that compatibility effects are reduced in mostly incompatible relative to mostly compatible locations. The episodic-retrieval account attributes the CSPC effect to location-specific representations that include the attentional settings formed via experience within a given location (e.g., a “focused” attentional setting becomes bound to a location with frequent conflict, whereas a “relaxed” setting becomes bound to one with infrequent conflict). However, Diede and Bugg (Attention, Perception, & Psychophysics, 78, 1255–1266, 2016) demonstrated that the attentional setting associated with a given location can be based on experiences that accumulate across multiple “grouped” locations—namely, those that are proximal to each other, relative to other (distal) locations. This spatial grouping effect supported the relative-proximity hypothesis, which we further tested in the present study. Experiment 1 replicated the spatial grouping effect and showed that it could be disrupted by a horizontal line dividing the otherwise grouped locations. Experiments 2 through 4 suggested that grouping might be a form of “chunking”—that is, the spatial grouping effect did not occur when the proximal locations were few enough in number (two) to represent independently, but it did occur when there were six locations. When there were eight proximal locations (and ten locations overall), the CSPC effect disappeared entirely. These findings suggest important boundary conditions for the relative-proximity hypothesis and inform our understanding of how past experiences with conflict are organized in the form of episodic representations that enable on-the-fly adjustments in cognitive control.

/pdf/boundary-conditions-for-the-influence-of-spatial-proximity-15ym0imvk6.pdf

Boundary conditions for the influence of spatial proximity on context-specific attentional settings

Cognitive control can adapt to the level of conflict present in the environment in a proactive (pre-stimulus onset) or reactive (post-stimulus onset) manner. This is evidenced by list-wide and location-specific proportion congruence effects, reduced interference in higher conflict lists or locations, respectively. Proactive control in the flanker task is believed to be supported by a conflict-induced-filtering (CIF) mechanism. The goal of the present set of experiments was to test if CIF also supports reactive location-specific control in the flanker task. To measure CIF, we interspersed a visual search task with a flanker task. After reproducing evidence for CIF using a two-location, list-wide proportion congruence manipulation (Experiment 1), we examined if a similar pattern emerges using a location-specific proportion congruence manipulation in Experiments 2 - 5. We found minimal evidence that reactive location-specific control employs a CIF mechanism. What was clear, however, is that the location-specific proportion congruence effect is susceptible to disruption from an intermixed task that dilutes the location-conflict signal. This highlights the need for alternative approaches to elucidate whether CIF or another mechanism supports reactive, location-specific control.

Conflict-induced perceptual filtering: A mechanism supporting location-specific control?

In a typical context-specific proportion congruent manipulation, participants are presented with Stroop stimuli in one of two contexts. In one context, stimuli are mostly incongruent. In the other context, stimuli are mostly congruent. Despite task-wide instructions to ignore the word and to name the color in which the word appears, the size of the congruency effect varies as a function of context. Specifically, the size of the congruency effect is reduced for the mostly incongruent relative to the mostly congruent context. The purpose of the current series of experiments is to explore the mechanisms underlying this context-specific proportion congruent (CSPC) effect when faces are used as the context. Existing manipulations have reported a face-based CSPC effect, however the results of these studies are confounded with contingency learning biases leaving an open question as to what processes faces serve to cue. In the four experiments reported here both inducer (contingency-biased) and diagnostic (contingency-unbiased) stimuli were included in a face-based context level manipulation. Across four experiments, a face-based CSPC effect is observed for inducer but not diagnostic stimuli, suggesting that this effect is driven by participants learning context + stimulus associations. 

/pdf/what-is-cued-by-faces-in-the-face-based-context-specific-1ghexkj6.pdf

What is cued by faces in the face-based context-specific proportion congruent manipulation?

Properties of context-driven control revealed through the analysis of sequential congruency effects

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Properties of context-driven control revealed through the analysis of sequential congruency effects