University of Strathclyde: People with Developmental Dyslexia have strengths that contributed to survival of our species, research suggests
Research suggests that people with dyslexia are specialised to explore the unknown, which is likely to play a fundamental role in human adaptation to changing environments.
The study into cognition, behaviour and the brain proposes this ‘explorative bias’ has an evolutionary basis and plays a crucial role in our survival.
The findings, reported in the journal Frontiers in Psychology, have implications both at the individual and societal level, and the researchers argue that we need to change our perspective of dyslexia as a neurological disorder.
Evolutionary perspective
The findings − which were apparent across multiple domains from visual processing to memory and at all levels of analysis – demonstrate the first-time a cross-disciplinary approach using an evolutionary perspective has been applied in the analysis of studies on dyslexia.
Lead author Dr Helen Taylor a Research Associate at the University of Strathclyde, and an affiliated Scholar at the McDonald Institute for Archaeological Research at the University of Cambridge, said:
The deficit-centred view of dyslexia isn’t telling the whole story. This research proposes a new framework to help us better understand the cognitive strengths of people with dyslexia.
“We believe that the areas of difficulty experienced by people with dyslexia result from a cognitive trade-off between exploration of new information and exploitation of existing knowledge, with the upside being an explorative bias that could explain enhanced abilities observed in certain realms like discovery, invention and creativity.”
Explorative learning
Dr Taylor added: “Schools, academic institutes and workplaces are not designed to make the most of explorative learning. But we urgently need to start nurturing this way of thinking to allow humanity to continue to adapt and solve key challenges.”
Dyslexia is found in up to 20% of the general population, irrespective of country, culture and world region. It is defined by the World Federation of Neurology as “a disorder in children who, despite conventional classroom experience, fail to attain the language skills of reading, writing and spelling commensurate with their intellectual abilities”.
Complementary Cognition
The new findings are explained in the context of ‘Complementary Cognition’, a theory proposing that our ancestors evolved to specialise in different, but complementary, ways of thinking, which enhances human’s ability to adapt through collaboration.
Dr Taylor said: “Striking the balance between exploring for new opportunities and exploiting the benefits of a particular choice is key to adaptation and survival and underpins many of the decisions we make in our daily lives.”
Exploration encompasses activities that involve searching the unknown such as experimentation, discovery and innovation. In contrast, exploitation is concerned with using what’s already known including refinement, efficiency and selection, and Dr Taylor added: “Considering this trade-off, an explorative specialisation in people with dyslexia could help explain why they have difficulties with tasks related to exploitation, such as reading and writing.
“It could also explain why people with dyslexia appear to gravitate towards certain professions that require exploration-related abilities, such as arts, architecture, engineering, and entrepreneurship.”
The research was funded by the Hunter Centre for Entrepreneurship, University of Strathclyde.
Human evolution
The researchers found their findings aligned with evidence from several other fields of research. For example, an explorative bias in such a large proportion of the population indicates that our species must have evolved during a period of high uncertainty and change. This concurs with findings in the field of paleoarchaeology, revealing that human evolution was shaped over hundreds of thousands of years by dramatic climatic and environmental instability.
The researchers also highlight that collaboration between individuals with different abilities could help explain the exceptional capacity of our species to adapt.