Orientation-dependency of perceptual surround suppression and orientation decoding of centre-surround stimuli are preserved with healthy ageing
Bao N Nguyen, Yu Man Chan, Stefan Bode, Allison M McKendrick
Vision Research | Elsevier BV | Published : 2020
A key visual neuronal property that is mirrored in human behaviour is centre-surround contrast suppression, which is orientation-dependent. When a target is embedded in a high-contrast surround, the centre appears reduced in contrast, the magnitude of which depends on the relative orientation between centre and surround. Previous reports demonstrate changes in perceptual surround suppression with ageing; however, whether the orientation-dependency of surround suppression is impacted by ageing has not been explored. Here, we tested 18 younger (aged 19–33) and 18 older (aged 60–77) adults. Perceptual surround suppression was stronger for parallel than orthogonal stimuli; however contrary to pr..View full abstract
Awarded by Australian Research Council
This work was supported by an Australian Research Council Discovery Project Grant (DP140100157) to AMM. The authors wish to thank Dr Daniel Feuerriegel for technical support with the Decision Decoding ToolBOX (DDTBOX) Matlab package.