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Sequential modulation of distractor-interference produced by semantic generalization of stimulus features.

Wendt M, Luna-Rodriguez A, Jacobsen T - Front Psychol (2014)

Bottom Line: To dismiss an alternative interpretation based on integration and retrieval of low-level features, it is important to exert experimental control of stimulus and response feature sequences.In two experiments we found evidence consistent with the assumption that semantic generalization of stimulus features, such as between a stimulus presented at a left-sided location and a stimulus shape pointing to the left, may yield a between-dimension Gratton effect.These findings raise doubts about inferring generalized attentional conflict adaptation when semantically related distractor dimensions are used.

View Article: PubMed Central - PubMed

Affiliation: Experimental Psychology Unit, Helmut Schmidt University/University of the Federal Armed Forces Hamburg Hamburg, Germany.

ABSTRACT
Sequential modulations of distractor-related interference (i.e., reduced congruency effect after incongruent as compared to congruent predecessor trials, a.k.a. Gratton effect) have been taken to reflect conflict-induced attentional focusing. To dismiss an alternative interpretation based on integration and retrieval of low-level features, it is important to exert experimental control of stimulus and response feature sequences. This has been achieved by considering only trials associated with complete feature changes. Furthermore, distractors from two different perceptual dimensions, such as stimulus location and shape, have been combined in the same experiment to investigate the question of specificity vs. generality of conflict adaptation. With this method feature sequence control can be exerted, in principle, without disregarding data from feature repetition trials. However, such control may be insufficient when the distractor dimensions overlap semantically. In two experiments we found evidence consistent with the assumption that semantic generalization of stimulus features, such as between a stimulus presented at a left-sided location and a stimulus shape pointing to the left, may yield a between-dimension Gratton effect. These findings raise doubts about inferring generalized attentional conflict adaptation when semantically related distractor dimensions are used.

No MeSH data available.


Related in: MedlinePlus

Mean reaction times and error percentages in Experiment 1 as a function of direction-congruency on the current trial (dir-cong, dir-inc), location-congruency on the preceding trial (prev loc-cong, prev loc-inc), and correspondence of the abstract feature sequences (match, mismatch).
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Figure 2: Mean reaction times and error percentages in Experiment 1 as a function of direction-congruency on the current trial (dir-cong, dir-inc), location-congruency on the preceding trial (prev loc-cong, prev loc-inc), and correspondence of the abstract feature sequences (match, mismatch).

Mentions: Location-congruency (N − 1) → direction-congruency (N). Trials were classified as a function of direction-congruency in trial N (congruent, incongruent), location-congruency in trial N − 1 (congruent, incongruent), and abstract correspondence (match, mismatch). Figure 2 displays mean RTs and error percentages for these data. Regarding RTs, the main effect of direction-congruency as well as the interaction with the location-congruency level of the preceding trial were replicated from the overall analysis, F(1, 14) = 4.9; p < 0.05; MSE = 207.4, and F(1, 14) = 5.7; p < 0.04; MSE = 139.6, respectively. As predicted by the semantic generalization hypothesis, this was modulated by the abstract correspondence, F(1, 14) = 10.3; p < 0.01; MSE = 31.1. Whereas on abstract match trials, the direction-based congruency effect amounted to 14 ms after location-congruent trials and −3 ms after location-incongruent trials, abstract mismatch trials were associated with 8 and 4 ms of direction-based interference after location-congruent and location-incongruent trials, respectively. The error data yielded no significant effects.


Sequential modulation of distractor-interference produced by semantic generalization of stimulus features.

Wendt M, Luna-Rodriguez A, Jacobsen T - Front Psychol (2014)

Mean reaction times and error percentages in Experiment 1 as a function of direction-congruency on the current trial (dir-cong, dir-inc), location-congruency on the preceding trial (prev loc-cong, prev loc-inc), and correspondence of the abstract feature sequences (match, mismatch).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4231843&req=5

Figure 2: Mean reaction times and error percentages in Experiment 1 as a function of direction-congruency on the current trial (dir-cong, dir-inc), location-congruency on the preceding trial (prev loc-cong, prev loc-inc), and correspondence of the abstract feature sequences (match, mismatch).
Mentions: Location-congruency (N − 1) → direction-congruency (N). Trials were classified as a function of direction-congruency in trial N (congruent, incongruent), location-congruency in trial N − 1 (congruent, incongruent), and abstract correspondence (match, mismatch). Figure 2 displays mean RTs and error percentages for these data. Regarding RTs, the main effect of direction-congruency as well as the interaction with the location-congruency level of the preceding trial were replicated from the overall analysis, F(1, 14) = 4.9; p < 0.05; MSE = 207.4, and F(1, 14) = 5.7; p < 0.04; MSE = 139.6, respectively. As predicted by the semantic generalization hypothesis, this was modulated by the abstract correspondence, F(1, 14) = 10.3; p < 0.01; MSE = 31.1. Whereas on abstract match trials, the direction-based congruency effect amounted to 14 ms after location-congruent trials and −3 ms after location-incongruent trials, abstract mismatch trials were associated with 8 and 4 ms of direction-based interference after location-congruent and location-incongruent trials, respectively. The error data yielded no significant effects.

Bottom Line: To dismiss an alternative interpretation based on integration and retrieval of low-level features, it is important to exert experimental control of stimulus and response feature sequences.In two experiments we found evidence consistent with the assumption that semantic generalization of stimulus features, such as between a stimulus presented at a left-sided location and a stimulus shape pointing to the left, may yield a between-dimension Gratton effect.These findings raise doubts about inferring generalized attentional conflict adaptation when semantically related distractor dimensions are used.

View Article: PubMed Central - PubMed

Affiliation: Experimental Psychology Unit, Helmut Schmidt University/University of the Federal Armed Forces Hamburg Hamburg, Germany.

ABSTRACT
Sequential modulations of distractor-related interference (i.e., reduced congruency effect after incongruent as compared to congruent predecessor trials, a.k.a. Gratton effect) have been taken to reflect conflict-induced attentional focusing. To dismiss an alternative interpretation based on integration and retrieval of low-level features, it is important to exert experimental control of stimulus and response feature sequences. This has been achieved by considering only trials associated with complete feature changes. Furthermore, distractors from two different perceptual dimensions, such as stimulus location and shape, have been combined in the same experiment to investigate the question of specificity vs. generality of conflict adaptation. With this method feature sequence control can be exerted, in principle, without disregarding data from feature repetition trials. However, such control may be insufficient when the distractor dimensions overlap semantically. In two experiments we found evidence consistent with the assumption that semantic generalization of stimulus features, such as between a stimulus presented at a left-sided location and a stimulus shape pointing to the left, may yield a between-dimension Gratton effect. These findings raise doubts about inferring generalized attentional conflict adaptation when semantically related distractor dimensions are used.

No MeSH data available.


Related in: MedlinePlus