scholarly journals Age-related changes in suprathreshold contrast perception in the upper and lower visual field: Effects of temporal/spatial frequency and contrast

2012 ◽  
Vol 12 (9) ◽  
pp. 472-472
Author(s):  
L. Leone ◽  
B. Blakeslee ◽  
M. E. McCourt
Keyword(s):  
Visual Field ◽  
Spatial Frequency ◽  
Lower Visual Field ◽  
Field Effects ◽  
Age Related ◽  
Contrast Perception ◽  
Age Related Changes

scholarly journals Age-Related Changes in the Functional Visual Field: Further Evidence for an Inverse Age x Eccentricity Effect

2004 ◽  
Vol 59 (1) ◽  
pp. P11-P18 ◽  
Author(s):  
T. R. M. Coeckelbergh ◽  
F. W. Cornelissen ◽  
W. H. Brouwer ◽  
A. C. Kooijman
Keyword(s):  
Visual Field ◽  
Eccentricity Effect ◽  
Age Related ◽  
Age Related Changes

Age-related changes in the central visual field for short-wavelength-sensitive pathways

1988 ◽  
Vol 5 (12) ◽  
pp. 2131 ◽  
Author(s):  
Chris A. Johnson ◽  
Anthony J. Adams ◽  
J. Daniel Twelker ◽  
Jacqueline M. Quigg
Keyword(s):  
Visual Field ◽  
Short Wavelength ◽  
Central Visual Field ◽  
Age Related ◽  
Age Related Changes

Age-Related Changes on a Children's Test of Sensory-Level Speech Perception Capacity

1998 ◽  
Vol 41 (1) ◽  
pp. 94-106 ◽  
Author(s):  
Theresa E. Hnath-Chisolm ◽  
Erin Laipply ◽  
Arthur Boothroyd
Keyword(s):  
Speech Perception ◽  
Normative Data ◽  
Choice Test ◽  
Sensory Level ◽  
Phonological Development ◽  
Clinical Implementation ◽  
Speech Pattern ◽  
Age Related ◽  
Contrast Perception ◽  
Age Related Changes

Normative data, as a function of age, were obtained on a test designed to assess sensory-level speech perception capacity, the Three-Interval Forced-Choice Test of Speech Pattern Contrast Perception, otherwise known as THRIFTSPAC (or THRIFT for short). Performance under the input modalities of hearing alone, speechreading alone, and the two combined was measured in 44 normally developing children between the ages of 5 years 7 months and 10 years 9 months. Resultsrevealed that within each condition there were significant influences of age on performance for children below age 7 years. These changes appeared to be related to cognitive and, possibly, to phonological development. Implications for the clinical implementation of THRIFT are discussed.

scholarly journals Differential age-related changes in localizing a target among distractors across an extended visual field

2016 ◽  
Vol 14 (2) ◽  
pp. 167-177 ◽  
Author(s):  
Jing Feng ◽  
Fergus I. M. Craik ◽  
Brian Levine ◽  
Sylvain Moreno ◽  
Gary Naglie ◽  
...  
Keyword(s):  
Visual Field ◽  
Age Related ◽  
Age Related Changes

Stimulus-Locked and Response-Locked ERP Correlates of Spatial Inhibition of Return (IOR) in Old Age

2014 ◽  
Vol 28 (3) ◽  
pp. 105-123 ◽  
Author(s):  
Elena Amenedo ◽  
Francisco-Javier Gutiérrez-Domínguez ◽  
Sara M. Mateos-Ruger ◽  
Paula Pazo-Álvarez
Keyword(s):  
Visual Field ◽  
Old Age ◽  
Visual Processing ◽  
Inhibition Of Return ◽  
Age Groups ◽  
Event Related Potential ◽  
Lower Visual Field ◽  
Response Preparation ◽  
Age Related ◽  
Upper Visual Field

Behavioral research has shown that Inhibition of Return (IOR) is preserved in old age although at longer time intervals between cue and target, which has been interpreted as reflecting a later disengagement from the cue. A recent event-related potential (ERP) study attributed this age-related pattern to an enhanced processing of the cue. Previous ERP research in young samples indicates that target and response processing are also affected by IOR, which makes interesting to study the ERP correlates of IOR from cue presentation to response execution. In this regard, in the present study stimulus-locked (cue-locked and target-locked) and response-locked ERPs were explored in healthy young and older participants. The behavioral results indicated preserved IOR in the older participants. The cue-locked ERPs could suggest that the older participants processed the cue as a warning signal to prepare for the upcoming target stimulus. Under IOR, target-locked ERPs of both age groups showed lower N1 amplitudes suggesting a suppression/inhibition of cued targets. During the P3 rising period, in young subjects a negative shift (Nd effect) to cued targets was observed in the lower visual field (LVF), and a positive shift (Pd effect) in the upper visual field. However, in the older group the Nd effect was absent suggesting a reduction of attentional resolution in the LVF. The older group showed enhanced motor activation to prepare correct responses, although IOR effects on response-locked lateralized readiness potential LRP indicated reduced response preparation to cued targets in both age groups. In general, results suggest that the older adults inhibit or reduce the visual processing of targets appearing at cued locations, and the preparation to respond to them, but with the added cost of allocating more attentional resources onto the cue and of maintaining a more effortful processing during the sequence of stimuli within the trial.

Age-Related Changes of the Normal Visual Field

1986 ◽  
Vol 104 (7) ◽  
pp. 1021-1025 ◽  
Author(s):  
G. J. Jaffe ◽  
J. A. Alvarado ◽  
R. P. Juster
Keyword(s):  
Visual Field ◽  
Age Related ◽  
Normal Visual Field ◽  
Age Related Changes

Development of face discrimination abilities, and relationship to magnocellular pathway development, between childhood and adulthood

2013 ◽  
Vol 30 (5-6) ◽  
pp. 251-262 ◽  
Author(s):  
PAMELA M. PALLETT ◽  
KAREN R. DOBKINS
Keyword(s):  
Spatial Frequency ◽  
Contrast Sensitivity ◽  
Face Processing ◽  
Luminance Contrast ◽  
Object Discrimination ◽  
Chromatic Contrast ◽  
Object Processing ◽  
Age Related ◽  
Visual Characteristics ◽  
Age Related Changes

AbstractThe current study tested the development of face and object processing in young children (mean age = 5.24 years), adolescents (mean age = 15.8 years), and adults (mean age = 21.1 years) using stimuli that were equated for low-level visual characteristics (luminance, contrast, and spatial frequency make-up) and methods that equate for difficulty across ages. We also tested sensitivity to luminance and chromatic contrast (i.e., thought to be mediated primarily by the subcortical Magnocellular (M) and Parvocellular (P) pathways, respectively) to determine whether age-related improvements in face or object discrimination were driven by age-related changes in the M and/or P pathways. Results showed a selective age-related improvement in face sensitivity and a relationship between age-related increases in face sensitivity and luminance contrast sensitivity. These results add to the mounting evidence that the M pathway may influence face processing.

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