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Task-specific modulation of memory for object features in natural scenes.

Robinson A, Triesch J - Adv Cogn Psychol (2008)

Bottom Line: When tested over short delays (seconds), no task effects were found.Over longer delays (minutes) we found the describing task influenced what types of changes were detected in a variety of explicit and incidental memory experiments.Furthermore, we found surprisingly high performance in the incidental memory experiment, suggesting that simple tasks are sufficient to instill long-lasting visual memories.

View Article: PubMed Central - PubMed

Affiliation: Department of Cognitive Science, University of California, San Diego,USA.

ABSTRACT
The influence of visual tasks on short and long-term memory for visual features was investigated using a change-detection paradigm. Subjects completed 2 tasks: (a) describing objects in natural images, reporting a specific property of each object when a crosshair appeared above it, and (b) viewing a modified version of each scene, and detecting which of the previously described objects had changed. When tested over short delays (seconds), no task effects were found. Over longer delays (minutes) we found the describing task influenced what types of changes were detected in a variety of explicit and incidental memory experiments. Furthermore, we found surprisingly high performance in the incidental memory experiment, suggesting that simple tasks are sufficient to instill long-lasting visual memories.

No MeSH data available.


Accuracy on change detection task for Experiment 1. Dashed line								represents chance performance.
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Figure 3: Accuracy on change detection task for Experiment 1. Dashed line represents chance performance.

Mentions: Change detection performance was compared for “central” and “marginal” interest items in a repeated measures ANOVA with two factors: “interest” and change type (Figure 3). Translation changes were not included since performance was near chance for these items. In addition, we did not include the subjects who participated in the taskless condition, since the lack of task may have left extra time for subjects to make extra saccades during or between trials. There was a main effect of interest, F(1,44) = 75, p < .0001, with changes to central interest items detected more often than for marginal interest items. There was also a main effect of change type, F(1,44) = 7, p < .01, with color changes being easier to detect. In contrast to the central and marginal interest changes, the low-level salience of the color and object changes were not equated, so this result is likely due to how these stimuli were constructed, rather than a general advantage for remembering colors.


Task-specific modulation of memory for object features in natural scenes.

Robinson A, Triesch J - Adv Cogn Psychol (2008)

Accuracy on change detection task for Experiment 1. Dashed line								represents chance performance.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2864998&req=5

Figure 3: Accuracy on change detection task for Experiment 1. Dashed line represents chance performance.
Mentions: Change detection performance was compared for “central” and “marginal” interest items in a repeated measures ANOVA with two factors: “interest” and change type (Figure 3). Translation changes were not included since performance was near chance for these items. In addition, we did not include the subjects who participated in the taskless condition, since the lack of task may have left extra time for subjects to make extra saccades during or between trials. There was a main effect of interest, F(1,44) = 75, p < .0001, with changes to central interest items detected more often than for marginal interest items. There was also a main effect of change type, F(1,44) = 7, p < .01, with color changes being easier to detect. In contrast to the central and marginal interest changes, the low-level salience of the color and object changes were not equated, so this result is likely due to how these stimuli were constructed, rather than a general advantage for remembering colors.

Bottom Line: When tested over short delays (seconds), no task effects were found.Over longer delays (minutes) we found the describing task influenced what types of changes were detected in a variety of explicit and incidental memory experiments.Furthermore, we found surprisingly high performance in the incidental memory experiment, suggesting that simple tasks are sufficient to instill long-lasting visual memories.

View Article: PubMed Central - PubMed

Affiliation: Department of Cognitive Science, University of California, San Diego,USA.

ABSTRACT
The influence of visual tasks on short and long-term memory for visual features was investigated using a change-detection paradigm. Subjects completed 2 tasks: (a) describing objects in natural images, reporting a specific property of each object when a crosshair appeared above it, and (b) viewing a modified version of each scene, and detecting which of the previously described objects had changed. When tested over short delays (seconds), no task effects were found. Over longer delays (minutes) we found the describing task influenced what types of changes were detected in a variety of explicit and incidental memory experiments. Furthermore, we found surprisingly high performance in the incidental memory experiment, suggesting that simple tasks are sufficient to instill long-lasting visual memories.

No MeSH data available.