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Colour vision
There are few studies, which directly address colour performance in ASD. Based on existing results, it can be said that there is poor colour perception in autism. Franklin, Pilling and Davies98 and Franklin et al99, 100 carried out a series of colour‐detection experiments on high functioning children with autism using various tasks, such as recognition memory, a search task and a target detection task. The findings found a general reduction in sensitivity to colour detection rather than having a specific colour defect such either tritanopia (blue‐yellow) or deuteranopia (red‐green). To these findings, Franklin et al99 worked with 14 high‐functioning autistic (HFA) children (mean age of 14 years) attending specialty a school and 14 matched typical developing children as a control group. The first experiment used the Farnsworth‐Munsell 100 hue test101 to measure the accuracy of chromatic discrimination and to identify the nature of any colour deficit in autism. The experiment was done with four trays of different coloured caps and the statistical results reported higher errors in the ASD group than the typical developing children group for colour discrimination. A second experiment of a threshold discrimination task was conducted to investigate colour blindness of the subsystem of colour vision (red‐green or blue‐yellow). There were 34 high‐functioning autistic children compared to 33 typical developing children. The first part of the task was to define a boundary line between the two halves of different coloured circles that varied in colours but had constant luminance for chromatic threshold. The second part was a luminance threshold task, the luminance of the two hemispheres changed along the task, while the colour was constant. All children had been pre‐tested with the City colour vision test102 and they were fully instructed throughout the experiment. Results showed a higher threshold in chromatic discrimination in high‐functioning autistics but no significant differences in defining luminance boundaries between the two groups as well as between the age or the non‐verbal inelegancy. Both experiments suggested that a true deficit was found in colour perception in ASD and no task difficulty or/and experimental differences can account for the variation of the results.
https://onlinelibrary.wiley.com/doi/ful ... /cxo.12383 I have a certain degree of difficulty when it comes to shades within a colour .
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Socially drifted middle class
04 Jul 2018, 10:21 am
