scholarly journals Comparisons of reaction time patterns in a sequential visual recognition task with simple geometric forms

1977 ◽  
Vol 22 (2) ◽  
pp. 191-200 ◽  
Author(s):  
Wallace T. Cleaves
Keyword(s):  
Reaction Time ◽  
Visual Recognition ◽  
Recognition Task ◽  
Time Patterns

scholarly journals Visual Recognition of Graphic Variants of Amharic Letters: Psycholinguistic Experiments

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Feda Negesse ◽  
Derib Ado
Keyword(s):  
Reaction Time ◽  
Lexical Decision ◽  
Visual Recognition ◽  
Recognition Task ◽  
Single Letter ◽  
Decision Task ◽  
Clear Pattern ◽  
Recognition Time ◽  
Frequency Counts ◽  
Psychological Experiments

One of the problems of Amharic orthography is a lack of consistency where the four Amharic sounds (/h/, /ʔ/, /s/ and /s’/) are mapped onto more than a single letter. The objective of these psychological experiments was to investigate the visual recognition of the graphic variants of the letters, both in isolation and within words. The experiments involved computation of the frequency counts of the letters in the Ten Ten Corpus for Amharic and the result revealed that there is a clear pattern of preference for the letters: the letters representing /h/ had the pattern , the letters representing /ʔ/ had the pattern , the letters representing /s/ had the pattern , and the letters representing /s’/ had the pattern in descending order of frequency. Similarly, the experiments indicated that frequency counts are significantly related to visual recognition of a letter, with the more frequent letters recognized faster with fewer errors. It was also observed that the target letters were recognized with a shorter reaction time when they were paired with themselves, but the recognition time was longer when they occurred with their graphic variants. Moreover, significantly higher percentage of errors were made when the target letters were matched with their graphic variants or their distractors in the alphabet recognition task. Similar patterns were also observed in the lexical decision task when the target letters were presented in words and pseudo-words. More rigorous psycholinguistic experiments, which will involve a large number of participants, are recommended to validate the results of the current experiments.

scholarly journals Changing Verbal Label Assignments Selects the Memory System for Responses in an Immediate Visual Recognition Task

2021 ◽  
Vol 1 (3) ◽  
Author(s):  
Alexa Becker ◽  
Mengxue Kang ◽  
Arnold Glass
Keyword(s):  
Reaction Time ◽  
Undergraduate Students ◽  
Test Item ◽  
Visual Recognition ◽  
Recognition Task ◽  
Verbal Label ◽  
Memory Systems ◽  
Memory System ◽  
Dual System ◽  
Mammalian Brain

The dual system hypothesis posits the existence of two neural systems for memory and learning in the mammalian brain: the habit system and the improvisational system. This study sought to determine whether both systems are involved in a visual recognition task originally outlined in Sternberg (1966) and whether each system could be selectively engaged on the basis of response assignment. Seventeen undergraduate students participated in an immediate visual recognition task where they responded whether or not a test consonant was present in a previous study sequence of one to six consonants by pressing one key for same or another key for different. When the different response was assigned to the spatially right “J” key, reaction time for targets and lures was a function of the study sequence size, indicating that the study sequence was serially scanned and compared with the test item by the habit system. However, when the same response was assigned to the spatially right “J” key, reaction time was not a function of study sequence size, indicating that the test item was not compared with the study sequence and responses were instead determined by perceived recency/novelty of the test item by the improvisational system. Differences in reaction time depending on response assignment suggest the selection of one memory system over the other based on verbal labels assigned to response keys in different spatial locations. Verbal label refers to the label of same or different assigned to the response keys in the experiment instructions. Results expand upon Sternberg (1966)—which used the same visual recognition task design as this study but did not account for response assignment, obscuring evidence of contributions from both memory systems—and provide more evidence for the dual-system hypothesis by demonstrating the involvement of both memory systems in immediate visual recognition.

STIMULUS COMPLEXITY, EEG ABUNDANCE GRADIENTS, AND DETECTION EFFICIENCY IN A VISUAL RECOGNITION TASK

1975 ◽  
Vol 66 (3) ◽  
pp. 289-298 ◽  
Author(s):  
ANTHONY GALE ◽  
GRAHAM SPRATT ◽  
BRUCE CHRISTIE ◽  
ADRIAN SMALLBONE
Keyword(s):  
Visual Recognition ◽  
Detection Efficiency ◽  
Recognition Task ◽  
Stimulus Complexity

scholarly journals A Study of Evaluating Useful Field of View at Visual Recognition Task

2006 ◽  
Vol 72 (719) ◽  
pp. 2248-2256 ◽  
Author(s):  
Kimihiro YAMANAKA ◽  
Hidetoshi NAKAYASU ◽  
Tetsuya MIYOSHI ◽  
Kazuaki MAEDA
Keyword(s):  
Visual Recognition ◽  
Recognition Task ◽  
Field Of View ◽  
Useful Field Of View

Perceptual selectivity in a visual recognition task.

1967 ◽  
Vol 74 (4, Pt.1) ◽  
pp. 543-549 ◽  
Author(s):  
Howard Egeth ◽  
Edward E. Smith
Keyword(s):  
Visual Recognition ◽  
Recognition Task
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