The Experts below are selected from a list of 163356 Experts worldwide ranked by ideXlab platform
Gerard Olivier - One of the best experts on this subject based on the ideXlab platform.
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concurrent right left and amplitude spatial Congruency effects in a visual discrimination task
Visual Cognition, 2015Co-Authors: Alexandre Coutté, Aurélien Richez, Yann Coello, Gerard OlivierAbstract:ABSTRACTDuring a perceptual task, the presentation of a visual stimulus is known to automatically activate a spatially congruent manual response, which influences the speed of the motor response provided depending on the non-spatial stimulus feature (e.g., colour). Such effect was found to depend on the Congruency between either the (1) right–left stimulus location and lateralized manual response (Simon effect), or (2) near–far stimulus location and manual response amplitude (Amplitude Congruency effect). In the present study, we conjointly manipulated Simon and Amplitude Congruency effects in a stimulus colour discrimination task. It was found that stimulus location potentiated concurrent but independent Simon and Amplitude Congruency effects: the more the to-be-executed response was congruent with the response activated by these effects, the faster was its execution. Moreover, our results suggest that the magnitude of Amplitude Congruency effect on response latency and execution time reflects the tempor...
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Concurrent right–left and amplitude spatial Congruency effects in a visual discrimination task.
Visual Cognition, 2015Co-Authors: Alexandre Coutté, Aurélien Richez, Yann Coello, Gerard OlivierAbstract:During a perceptual task, the presentation of a visual stimulus is known to automatically activate a spatially congruent manual response, which influences the speed of the motor response provided depending on the non-spatial stimulus feature (e.g., colour). Such effect was found to depend on the Congruency between either the (1) right–left stimulus location and lateralized manual response (Simon effect), or (2) near–far stimulus location and manual response amplitude (Amplitude Congruency effect). In the present study, we conjointly manipulated Simon and Amplitude Congruency effects in a stimulus colour discrimination task. It was found that stimulus location potentiated concurrent but independent Simon and Amplitude Congruency effects: the more the to-be-executed response was congruent with the response activated by these effects, the faster was its execution. Moreover, our results suggest that the magnitude of Amplitude Congruency effect on response latency and execution time reflects the temporal characteristics of the motor response planning. [ABSTRACT FROM AUTHOR]
Sergio A. Estay - One of the best experts on this subject based on the ideXlab platform.
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Correspondence between the habitat of the threatened pudú (Cervidae) and the national protected-area system of Chile
BMC ecology, 2016Co-Authors: Melissa A. Pavez-fox, Sergio A. EstayAbstract:Background Currently, many species are facing serious conservation problems due to habitat loss. The impact of the potential loss of biodiversity associated with habitat loss is difficult to measure. This is particularly the case with inconspicuous species such as the threatened pudu (Pudu puda), an endemic Cervidae of temperate forests of Chile and Argentina. To evaluate the effectiveness of the Chilean protected-area system in protecting the habitat of the pudu, we measured the congruence between this specie’s potential distribution and the geographical area occupied by the protected areas in central and southern Chile. The measurements of Congruency were made using the Maxent modeling method.
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Correspondence between the habitat of the threatened pudú (Cervidae) and the national protected-area system of Chile
BMC ecology, 2016Co-Authors: Melissa A. Pavez-fox, Sergio A. EstayAbstract:Currently, many species are facing serious conservation problems due to habitat loss. The impact of the potential loss of biodiversity associated with habitat loss is difficult to measure. This is particularly the case with inconspicuous species such as the threatened pudu (Pudu puda), an endemic Cervidae of temperate forests of Chile and Argentina. To evaluate the effectiveness of the Chilean protected-area system in protecting the habitat of the pudu, we measured the congruence between this specie’s potential distribution and the geographical area occupied by the protected areas in central and southern Chile. The measurements of Congruency were made using the Maxent modeling method. The potential habitat of the pudu was found to be poorly represented in the system (3–8 %) and even the most suitable areas for the species are not currenly protected. According to these results, the protected area network cannot be considered as a key component of the conservation strategy for this species. The results presented here also serve as a guide for the reevaluation of current pudu conservation strategies, for the design of new field studies to detect the presence of this species in human-disturbed areas or remaining patches of native forest, and for the implementation of corridors to maximize the success of conservation efforts.
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Correspondence between the habitat of the threatened pudú (Cervidae) and the national protected-area system of Chile
BMC Ecology, 2016Co-Authors: Melissa Pavez-fox, Sergio A. EstayAbstract:Background Currently, many species are facing serious conservation problems due to habitat loss. The impact of the potential loss of biodiversity associated with habitat loss is difficult to measure. This is particularly the case with inconspicuous species such as the threatened pudú ( Pudu puda ), an endemic Cervidae of temperate forests of Chile and Argentina. To evaluate the effectiveness of the Chilean protected-area system in protecting the habitat of the pudú, we measured the congruence between this specie’s potential distribution and the geographical area occupied by the protected areas in central and southern Chile. The measurements of Congruency were made using the Maxent modeling method. Results The potential habitat of the pudú was found to be poorly represented in the system (3–8 %) and even the most suitable areas for the species are not currenly protected. According to these results, the protected area network cannot be considered as a key component of the conservation strategy for this species. Conclusions The results presented here also serve as a guide for the reevaluation of current pudú conservation strategies, for the design of new field studies to detect the presence of this species in human-disturbed areas or remaining patches of native forest, and for the implementation of corridors to maximize the success of conservation efforts.
Alexandre Coutté - One of the best experts on this subject based on the ideXlab platform.
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concurrent right left and amplitude spatial Congruency effects in a visual discrimination task
Visual Cognition, 2015Co-Authors: Alexandre Coutté, Aurélien Richez, Yann Coello, Gerard OlivierAbstract:ABSTRACTDuring a perceptual task, the presentation of a visual stimulus is known to automatically activate a spatially congruent manual response, which influences the speed of the motor response provided depending on the non-spatial stimulus feature (e.g., colour). Such effect was found to depend on the Congruency between either the (1) right–left stimulus location and lateralized manual response (Simon effect), or (2) near–far stimulus location and manual response amplitude (Amplitude Congruency effect). In the present study, we conjointly manipulated Simon and Amplitude Congruency effects in a stimulus colour discrimination task. It was found that stimulus location potentiated concurrent but independent Simon and Amplitude Congruency effects: the more the to-be-executed response was congruent with the response activated by these effects, the faster was its execution. Moreover, our results suggest that the magnitude of Amplitude Congruency effect on response latency and execution time reflects the tempor...
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Concurrent right–left and amplitude spatial Congruency effects in a visual discrimination task.
Visual Cognition, 2015Co-Authors: Alexandre Coutté, Aurélien Richez, Yann Coello, Gerard OlivierAbstract:During a perceptual task, the presentation of a visual stimulus is known to automatically activate a spatially congruent manual response, which influences the speed of the motor response provided depending on the non-spatial stimulus feature (e.g., colour). Such effect was found to depend on the Congruency between either the (1) right–left stimulus location and lateralized manual response (Simon effect), or (2) near–far stimulus location and manual response amplitude (Amplitude Congruency effect). In the present study, we conjointly manipulated Simon and Amplitude Congruency effects in a stimulus colour discrimination task. It was found that stimulus location potentiated concurrent but independent Simon and Amplitude Congruency effects: the more the to-be-executed response was congruent with the response activated by these effects, the faster was its execution. Moreover, our results suggest that the magnitude of Amplitude Congruency effect on response latency and execution time reflects the temporal characteristics of the motor response planning. [ABSTRACT FROM AUTHOR]
Julie M. Bugg - One of the best experts on this subject based on the ideXlab platform.
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Congruency precues moderate item-specific proportion Congruency effects.
Attention perception & psychophysics, 2016Co-Authors: Keith A. Hutchison, Julie M. Bugg, You Bin Lim, Mariana R. OlsenAbstract:The item-specific proportion Congruency (ISPC) effect refers to the reduction in the Stroop effect for items (e.g., words) that mostly appear in an incongruent format, as compared to items that mostly appear in a congruent format. It is thought to demonstrate reactive control of word-reading processes. In the present study, we tested the hypothesis that using explicit, trial-by-trial Congruency precues to proactively guide attention during a color-word Stroop task could reduce the otherwise robust ISPC effect. In Experiment 1, the precueing manipulation was employed alongside a manipulation traditionally thought to influence proactive control of word-reading processes (i.e., list proportion congruence [list PC]). Precueing participants with 100 %-valid precues eliminated both the ISPC effect and the list PC effect. In Experiment 2, we used 70 %-valid Congruency precues to direct participants to generally expect conflict or congruence on a given trial. ISPC effects were selectively reduced when the participants expected conflict. These results suggest that precueing influences engagement in proactive control and, as a result, reduces the impact of item-specific and list-based tendencies to direct attention toward or away from word reading.
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Proactive control of irrelevant task rules during cued task switching
Psychological research, 2015Co-Authors: Julie M. Bugg, Todd S. BraverAbstract:In task-switching paradigms, participants are often slower on incongruent than congruent trials, a pattern known as the task-rule Congruency effect. This effect suggests that irrelevant task rules or associated responses may be retrieved automatically in spite of task cues. The purpose of the present study was to examine whether the task-rule Congruency effect may be modulated via manipulations intended to induce variation in proactive control. Manipulating the proportion of congruent to incongruent trials strongly influenced the magnitude of the task-rule Congruency effect. The effect was significantly reduced in a mostly incongruent list relative to a mostly congruent list, a pattern that was observed for not only biased but also 50 % congruent items. This finding implicates a role for global attentional control processes in the task-rule Congruency effect. In contrast, enhancing the preparation of relevant (cued) task rules by the provision of a monetary incentive substantially reduced mixing costs but did not affect the task-rule Congruency effect. These patterns support the view that there may be multiple routes by which proactive control can influence task-switching performance; however, only select routes appear to influence the automatic retrieval of irrelevant task rules.
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converging evidence for control of color word stroop interference at the item level
Journal of Experimental Psychology: Human Perception and Performance, 2013Co-Authors: Julie M. Bugg, Keith A. HutchisonAbstract:Prior studies have shown that cognitive control is implemented at the list and context levels in the color–word Stroop task. At first blush, the finding that Stroop interference is reduced for mostly incongruent items as compared with mostly congruent items (i.e., the item-specific proportion congruence [ISPC] effect) appears to provide evidence for yet a third level of control, which modulates word reading at the item level. However, evidence to date favors the view that ISPC effects reflect the rapid prediction of high-contingency responses and not item-specific control. In Experiment 1, we first show that an ISPC effect is obtained when the relevant dimension (i.e., color) signals proportion Congruency, a problematic pattern for theories based on differential response contingencies. In Experiment 2, we replicate and extend this pattern by showing that item-specific control settings transfer to new stimuli, ruling out alternative frequency-based accounts. In Experiment 3, we revert to the traditional design in which the irrelevant dimension (i.e., word) signals proportion Congruency. Evidence for item-specific control, including transfer of the ISPC effect to new stimuli, is apparent when 4-item sets are employed but not when 2-item sets are employed. We attribute this pattern to the absence of high-contingency responses on incongruent trials in the 4-item set. These novel findings provide converging evidence for reactive control of color–word Stroop interference at the item level, reveal theoretically important factors that modulate reliance on item-specific control versus contingency learning, and suggest an update to the item-specific control account (Bugg, Jacoby, & Chanani, 2011).
Aurélien Richez - One of the best experts on this subject based on the ideXlab platform.
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concurrent right left and amplitude spatial Congruency effects in a visual discrimination task
Visual Cognition, 2015Co-Authors: Alexandre Coutté, Aurélien Richez, Yann Coello, Gerard OlivierAbstract:ABSTRACTDuring a perceptual task, the presentation of a visual stimulus is known to automatically activate a spatially congruent manual response, which influences the speed of the motor response provided depending on the non-spatial stimulus feature (e.g., colour). Such effect was found to depend on the Congruency between either the (1) right–left stimulus location and lateralized manual response (Simon effect), or (2) near–far stimulus location and manual response amplitude (Amplitude Congruency effect). In the present study, we conjointly manipulated Simon and Amplitude Congruency effects in a stimulus colour discrimination task. It was found that stimulus location potentiated concurrent but independent Simon and Amplitude Congruency effects: the more the to-be-executed response was congruent with the response activated by these effects, the faster was its execution. Moreover, our results suggest that the magnitude of Amplitude Congruency effect on response latency and execution time reflects the tempor...
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Concurrent right–left and amplitude spatial Congruency effects in a visual discrimination task.
Visual Cognition, 2015Co-Authors: Alexandre Coutté, Aurélien Richez, Yann Coello, Gerard OlivierAbstract:During a perceptual task, the presentation of a visual stimulus is known to automatically activate a spatially congruent manual response, which influences the speed of the motor response provided depending on the non-spatial stimulus feature (e.g., colour). Such effect was found to depend on the Congruency between either the (1) right–left stimulus location and lateralized manual response (Simon effect), or (2) near–far stimulus location and manual response amplitude (Amplitude Congruency effect). In the present study, we conjointly manipulated Simon and Amplitude Congruency effects in a stimulus colour discrimination task. It was found that stimulus location potentiated concurrent but independent Simon and Amplitude Congruency effects: the more the to-be-executed response was congruent with the response activated by these effects, the faster was its execution. Moreover, our results suggest that the magnitude of Amplitude Congruency effect on response latency and execution time reflects the temporal characteristics of the motor response planning. [ABSTRACT FROM AUTHOR]
