Abstract:
:Reaction times (RTs) are obtained for a wide range of contrasts of vertical sinusoidal gratings. The data are plotted as a function of the reciprocal of contrast. In some conditions, a single linear function accounts for the data. In others a clear bi-linear function is obtained. The low and high contrast regions of the function are interpreted as representing magno and parvo activity, respectively. RT-based supra-threshold sensitivity functions are obtained for different luminances, stimulus durations and eccentricities and these are compared with conventional threshold-based sensitivities to establish the extent to which RTs and contrast sensitivity are constrained by the same sensory processes.
journal_name
Vision Resjournal_title
Vision researchauthors
Murray IJ,Plainis Sdoi
10.1016/s0042-6989(03)00408-5subject
Has Abstractpub_date
2003-11-01 00:00:00pages
2707-19issue
25eissn
0042-6989issn
1878-5646pii
S0042698903004085journal_volume
43pub_type
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