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Visual similarity in masking and priming: The critical role of task relevance.

Enns JT, Oriet C - Adv Cogn Psychol (2008)

Bottom Line: (2) Are similarity effects in both tasks governed by the extent of feature overlap in the images or only by task-relevant features?Results showed that similarity reduced the visibility of the target in the masking task and increased response speed in the priming task, pointing to a double-dissociation between the two tasks.These findings are interpreted within the framework of a reentrant theory of visual perception.

View Article: PubMed Central - PubMed

Affiliation: University of British Columbia.

ABSTRACT
Cognitive scientists use rapid image sequences to study both the emergence of conscious perception (visual masking) and the unconscious processes involved in response preparation (masked priming). The present study asked two questions: (1) Does image similarity influence masking and priming in the same way? (2) Are similarity effects in both tasks governed by the extent of feature overlap in the images or only by task-relevant features? Participants in Experiment 1 classified human faces using a single dimension even though the faces varied in three dimensions (emotion, race, sex). Abstract geometric shapes and colors were tested in the same way in Experiment 2. Results showed that similarity reduced the visibility of the target in the masking task and increased response speed in the priming task, pointing to a double-dissociation between the two tasks. Results also showed that only task-relevant (not objective) similarity influenced masking and priming, implying that both tasks are influenced from the beginning by intentions of the participant. These findings are interpreted within the framework of a reentrant theory of visual perception. They imply that intentions can influence object formation prior to the separation of vision for perception and vision for action.

No MeSH data available.


Related in: MedlinePlus

(A) Illustration of the display sequences in Experiment								1. In the mask classification task participants indicated as rapidly								as possible either the emotion (angry, happy), the race (Asian,								Caucasian) or the sex (female, male) of the mask face. In the prime								classification task, participants made these same judgments of the								prime face as accurately as possible. (B) Examples of								the faces used in Experiment 1.
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Figure 1: (A) Illustration of the display sequences in Experiment 1. In the mask classification task participants indicated as rapidly as possible either the emotion (angry, happy), the race (Asian, Caucasian) or the sex (female, male) of the mask face. In the prime classification task, participants made these same judgments of the prime face as accurately as possible. (B) Examples of the faces used in Experiment 1.

Mentions: Each trial consisted of the following display sequence as shown in Figure 1: a prime face was presented for 22 ms, followed by a blank gray interval of 0, 22, or 45 ms, and then a mask face was presented for 504 ms. Response feedback was given for both tasks in the form of a plus sign (correct response), minus sign (incorrect response) or circle (no response) at the center of the screen, and remained on view for 1.5 s. This also served as the fixation point and warning symbol for the start of the next trial, which began 0.5 s after the feedback symbol was erased. Participants were given 2 s to make a response.


Visual similarity in masking and priming: The critical role of task relevance.

Enns JT, Oriet C - Adv Cogn Psychol (2008)

(A) Illustration of the display sequences in Experiment								1. In the mask classification task participants indicated as rapidly								as possible either the emotion (angry, happy), the race (Asian,								Caucasian) or the sex (female, male) of the mask face. In the prime								classification task, participants made these same judgments of the								prime face as accurately as possible. (B) Examples of								the faces used in Experiment 1.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2864988&req=5

Figure 1: (A) Illustration of the display sequences in Experiment 1. In the mask classification task participants indicated as rapidly as possible either the emotion (angry, happy), the race (Asian, Caucasian) or the sex (female, male) of the mask face. In the prime classification task, participants made these same judgments of the prime face as accurately as possible. (B) Examples of the faces used in Experiment 1.
Mentions: Each trial consisted of the following display sequence as shown in Figure 1: a prime face was presented for 22 ms, followed by a blank gray interval of 0, 22, or 45 ms, and then a mask face was presented for 504 ms. Response feedback was given for both tasks in the form of a plus sign (correct response), minus sign (incorrect response) or circle (no response) at the center of the screen, and remained on view for 1.5 s. This also served as the fixation point and warning symbol for the start of the next trial, which began 0.5 s after the feedback symbol was erased. Participants were given 2 s to make a response.

Bottom Line: (2) Are similarity effects in both tasks governed by the extent of feature overlap in the images or only by task-relevant features?Results showed that similarity reduced the visibility of the target in the masking task and increased response speed in the priming task, pointing to a double-dissociation between the two tasks.These findings are interpreted within the framework of a reentrant theory of visual perception.

View Article: PubMed Central - PubMed

Affiliation: University of British Columbia.

ABSTRACT
Cognitive scientists use rapid image sequences to study both the emergence of conscious perception (visual masking) and the unconscious processes involved in response preparation (masked priming). The present study asked two questions: (1) Does image similarity influence masking and priming in the same way? (2) Are similarity effects in both tasks governed by the extent of feature overlap in the images or only by task-relevant features? Participants in Experiment 1 classified human faces using a single dimension even though the faces varied in three dimensions (emotion, race, sex). Abstract geometric shapes and colors were tested in the same way in Experiment 2. Results showed that similarity reduced the visibility of the target in the masking task and increased response speed in the priming task, pointing to a double-dissociation between the two tasks. Results also showed that only task-relevant (not objective) similarity influenced masking and priming, implying that both tasks are influenced from the beginning by intentions of the participant. These findings are interpreted within the framework of a reentrant theory of visual perception. They imply that intentions can influence object formation prior to the separation of vision for perception and vision for action.

No MeSH data available.


Related in: MedlinePlus