Key Questions (Edexcel A-Level Psychology): Revision Notes
Working Memory and Dyslexia
Understanding dyslexia and working memory
Dyslexia is a reading disorder that arises from difficulties with working memory capacity. Children with this condition struggle to retain sufficient information in working memory, which creates problems when attempting to blend sounds together to form words and when connecting letters with their corresponding sounds. These processing challenges lead to slower reading and writing speeds compared to their peers.
The cognitive difficulties extend beyond simple word recognition. Children with dyslexia typically experience phonological deficits, meaning they process phonological information inefficiently within the brain. This manifests in various ways:
- Problems with short-term verbal memory, such as non-word repetition tasks
- Difficulties with rapid naming exercises
- Challenges when learning new languages
- Impaired skills in reading, writing, spelling and grammar comprehension
Detection usually occurs during preschool and early primary education, when literacy demands increase. At this stage, educators can implement various support strategies to help students manage their condition.
Intervention approaches for dyslexia
Two main intervention types have been developed to support children with dyslexia in educational settings. The first involves modifying the classroom environment and teaching methods to accommodate working memory limitations. The second focuses on directly training and improving working memory capacity through targeted exercises.
Classroom-based strategies
These environmental modifications help reduce the cognitive load on students with dyslexia. Educators can implement the following approaches:
- Clearly stating lesson aims at the start of each session
- Using checklists to break down complex tasks into manageable steps
- Simplifying instructions to avoid overwhelming working memory
- Highlighting or colour coding information to make important content stand out
- Using audio and visual materials to provide multiple input channels
- Avoiding asking children to read aloud in front of the class
The Rationale Behind These Strategies
By simplifying classroom tasks and breaking them into smaller components, teachers avoid overloading the limited working memory capacity that characterises dyslexia. Children with this condition also process information more slowly, so reducing lengthy periods of teacher-led instruction and using varied delivery methods helps prevent phonological loop overload (where the verbal rehearsal system becomes overwhelmed).
Additional subject-specific considerations apply. Spelling proves difficult for children with dyslexia because they cannot easily associate letter sounds with printed symbols. Phonics strategies—which use phonological rules to teach letter-sound relationships and encourage blending practice—can provide structured support.
Mathematics and Working Memory
Mathematics presents particular challenges for students with dyslexia, as solving problems requires holding multiple steps in working memory simultaneously. Writing down or verbally discussing each arithmetic step helps ensure the process is broken into stages that working memory can manage.
Direct intervention programmes
Rather than simply accommodating working memory limitations, direct intervention programmes actively train memory skills. Several computer-based programmes have been designed for this purpose, targeting either general working memory capacity (such as Cogmed) or specific memory skills (such as the N-Back programme).
Research Evidence
Studies by Klingberg et al. (2005) and Jaeggi et al. (2011) have demonstrated that these programmes can enhance working memory, producing long-lasting cognitive improvements and better academic performance in both Mathematics and English.
Evaluating intervention effectiveness
Snowling and Hulme (2011) conducted a comprehensive review of dyslexia interventions, concluding that support should specifically target improvements in:
- Phonological awareness (understanding sound structures in language)
- Letter-sound recognition and correspondence
- Practical reading and writing exercises
However, they noted that no single intervention works universally—children present with different literacy difficulties, making a 'one size fits all' approach ineffective.
The Diagnosis Delay Problem
A concerning delay in diagnosing literacy difficulties has been identified, with symptoms sometimes mistaken for attention problems. This delay makes early intervention more difficult to implement, potentially reducing the effectiveness of support strategies.
Beyond cognitive symptoms, dyslexia affects social and emotional wellbeing. Children may experience reduced self-esteem and confidence due to their learning difficulties. Whilst intervention programmes focus on memory enhancement techniques, they typically do not address these psychological aspects.
The Emotional Dimension
Emotional support remains important, as social and emotional difficulties may persist even after working memory improves. A comprehensive approach to supporting children with dyslexia should consider both cognitive and psychological needs.
Current evidence suggests both classroom-based strategies and direct intervention programmes offer cognitive benefits, particularly when implemented early. However, questions remain about the long-term effectiveness of these interventions and whether improvements in working memory tasks transfer to everyday academic activities.
Key Points to Remember:
- Dyslexia stems from working memory difficulties that affect the ability to hold and manipulate phonological information, impacting reading, writing, spelling and grammar skills.
- Two main intervention approaches exist: classroom strategies that reduce cognitive load, and direct programmes that train working memory capacity.
- Classroom strategies include clear lesson aims, checklists, simplified instructions, colour coding, audio-visual materials, and avoiding reading aloud.
- Direct interventions like Cogmed and N-Back programmes show evidence of improving working memory with lasting cognitive and academic gains.
- Early intervention is important, but no single approach works for all children—interventions must be tailored to individual literacy difficulties, and social-emotional aspects of dyslexia also require attention.