scholarly journals Gazes Induce Similar Sequential Effects as Arrows in a Target Discrimination Task

2017 ◽  
pp. 57-65
Author(s):  
Qian Qian ◽  
Xiaoting Wang ◽  
Miao Song ◽  
Feng Wang
Keyword(s):  
Discrimination Task ◽  
Sequential Effects ◽  
Target Discrimination

Masking Effects of Similar and Dissimilar Letters: A Test of the Interactive Channels Model

1977 ◽  
Vol 44 (3_suppl) ◽  
pp. 1219-1228 ◽  
Author(s):  
James T. Townsend ◽  
Joan Gay Snodgrass
Keyword(s):  
Discrimination Task ◽  
Noise Letter ◽  
Target Discrimination ◽  
The Right

Subjects identified which of two target letters was presented when the target was accompanied by a similar or dissimilar noise letter, the target appeared on the right or left of fixation, and the target was central or peripheral to the noise letter. Although performance deteriorated in the presence of noise letters compared to control conditions, masking was no greater with similar than dissimilar noise letters. Rather masking effects were specific to particular target-mask pairs, suggesting facilitation of target perception when mask and target shared features critical to the target-discrimination task. Thus, no evidence for Estes' interactive channels model was obtained. Neither the left vs right position of the target nor its centrality had any effect on accuracy or speed. Correct latencies to a target covaried with its accuracy of detection, but incorrect latencies were more strongly associated with the target identified than with the target presented.

Event-related potentials during a target discrimination task based on texture cue

2003 ◽  
Vol 34 (14) ◽  
pp. 34-43 ◽  
Author(s):  
Jiuk Jung ◽  
Tetsuo Kobayashi ◽  
Yuwen Li ◽  
Shinya Kuriki
Keyword(s):  
Discrimination Task ◽  
Event Related Potentials ◽  
Target Discrimination ◽  
Related Potentials

Gamma oscillations in gerbil auditory cortex during a target-discrimination task reflect matches with short-term memory

2008 ◽  
Vol 1220 ◽  
pp. 70-80 ◽  
Author(s):  
Marcus Jeschke ◽  
Daniel Lenz ◽  
Eike Budinger ◽  
Christoph S. Herrmann ◽  
Frank W. Ohl
Keyword(s):  
Auditory Cortex ◽  
Discrimination Task ◽  
Short Term Memory ◽  
Gamma Oscillations ◽  
Short Term ◽  
Term Memory ◽  
Target Discrimination

Interactions in the Discrimination and Absolute Judgement of Orientation and Length

Perception ◽  
1988 ◽  
Vol 17 (2) ◽  
pp. 177-189 ◽  
Author(s):  
Miri Dick ◽  
Shaul Hochstein
Keyword(s):  
Reaction Time ◽  
Sensory Processing ◽  
Discrimination Task ◽  
Reaction Times ◽  
Two Dimensions ◽  
Orientation Discrimination ◽  
Sequential Effects ◽  
Amount Of Information ◽  
Random Fashion ◽  
Absolute Judgement

An asymmetric model is described for interactions in the perception of two dimensions (length and orientation) of a single visual stimulus. Two methods were used to test these interactions, and models for the interpretation of the possible outcomes of these tests are discussed. A length discrimination task showed facilitation (decreased reaction time) when orientation was covaried with length, and interference (increased reaction time) when random orientation variation was introduced. A smaller effect was seen when length was varied in an orientation discrimination task in a correlated or random fashion. Analysis of sequential effects showed that reaction times are fastest on repetition trials and are slowed by either the need to change the response or the need for additional sensory processing. With the second method, it was found that the amount of information transmitted in the estimation of orientation was not affected by the introduction of the redundant dimension of length, but that there was a significant gain in the amount of information transmitted in the estimation of length by the addition of the redundant dimension of orientation. It is concluded that orientation is probably a perceptual primitive of the visual system whereas length is a computed variable.

Stimulus Ratio Effects on Speech Discrimination by Children and Adults

1991 ◽  
Vol 34 (3) ◽  
pp. 671-678 ◽  
Author(s):  
Joan E. Sussman
Keyword(s):  
Discrimination Task ◽  
Response Pattern ◽  
Response Patterns ◽  
Speech Discrimination ◽  
Adult Group ◽  
Discrimination Accuracy ◽  
Formant Frequency ◽  
Response Strategies ◽  
Place Of Articulation ◽  
Adults And Children

This investigation examined the response strategies and discrimination accuracy of adults and children aged 5–10 as the ratio of same to different trials was varied across three conditions of a “change/no-change” discrimination task. The conditions varied as follows: (a) a ratio of one-third same to two-thirds different trials (33% same), (b) an equal ratio of same to different trials (50% same), and (c) a ratio of two-thirds same to one-third different trials (67% same). Stimuli were synthetic consonant-vowel syllables that changed along a place of articulation dimension by formant frequency transition. Results showed that all subjects changed their response strategies depending on the ratio of same-to-different trials. The most lax response pattern was observed for the 50% same condition, and the most conservative pattern was observed for the 67% same condition. Adult response patterns were most conservative across condition. Differences in discrimination accuracy as measured by P(C) were found, with the largest difference in the 5- to 6-year-old group and the smallest change in the adult group. These findings suggest that children’s response strategies, like those of adults, can be manipulated by changing the ratio of same-to-different trials. Furthermore, interpretation of sensitivity measures must be referenced to task variables such as the ratio of same-to-different trials.

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