CTOPP-2 Assessment
Reading difficulties don’t always mean dyslexia. The CTOPP-2 helps us discover why a student is struggling by measuring the underlying skills that make reading possible.
It is one of the most important assessments in our Gold Standard battery because it allows us to distinguish true dyslexia from difficulties caused by learning in a second language or other factors. For many students, it provides the missing piece of the diagnostic puzzle.
The Comprehensive Test of Phonological Processing – Second Edition (CTOPP-2) is one of the world’s leading assessments for identifying the underlying processing difficulties associated with dyslexia.
Whenever our assessment indicates significant reading difficulties, the CTOPP-2 is used to investigate the cognitive processes that support reading, spelling and decoding.
Simply put, the WIAT-III tells us that reading is difficult. The CTOPP-2 tells us why.
Why the CTOPP-2 Matters
Reading tests measure performance.
The CTOPP-2 measures the skills that make successful reading possible.
A student may achieve below-average reading scores for many different reasons, including limited exposure to English, interrupted schooling, attention difficulties or a specific learning disorder such as dyslexia.
The CTOPP-2 helps us distinguish between these possibilities by examining the underlying processing abilities that are known to predict reading success.
Without this information, it is difficult to say with confidence whether a student has dyslexia or simply needs more language exposure or educational support.
What Does the CTOPP-2 Measure?
The assessment focuses on three core areas that are essential for learning to read.
Phonological Awareness
This measures a student’s ability to recognise and manipulate the sounds within words.
Tasks in the test include:
- Blending sounds together
- Breaking words into individual sounds
- Removing or changing sounds within words
These are the fundamental building blocks of reading and spelling.
Phonological Memory
This measures how well a student can hold speech sounds in their short-term memory while processing them.
Strong phonological memory is essential for:
- Learning new vocabulary
- Reading unfamiliar words
- Following complex verbal instructions
Rapid Automatic Naming
This measures how quickly a student can retrieve familiar information, such as letters, numbers, colours or objects.
Slow retrieval speed is commonly associated with reduced reading fluency and can continue into adulthood, even after reading accuracy has improved.
Why the CTOPP-2 Is So Valuable for International School Students
One of the biggest challenges in international education is determining whether a student’s reading difficulties are caused by learning in English as an additional language or by dyslexia.
These two situations can appear very similar in the classroom and CTOPP-2 helps separate them.
Because it measures how a student processes speech sounds rather than how many English words they know, it is much less influenced by vocabulary or language exposure.
For example:
- A student who has recently begun learning in English may read slowly but demonstrate strong phonological processing skills. This suggests that additional language experience is likely to improve reading.
- A student with genuine dyslexia typically shows weaknesses in phonological processing regardless of which language they speak. These underlying processing difficulties do not disappear simply through additional teaching.
This distinction is important because the support each student needs is entirely different.
How the CTOPP-2 Fits Into Our Gold Standard Assessment
The CTOPP-2 explains the underlying cause of reading difficulties. Our other assessments show how those difficulties affect learning.
For example:
- WIAT-III measures reading accuracy, reading fluency, spelling and comprehension.
- WISC-V or WAIS-IV evaluates overall cognitive ability, including working memory and processing speed.
- MOXO Continuous Performance Test determines whether poor reading performance may instead be related to attention difficulties.
- Additional assessments examine writing, mathematics and broader academic achievement where appropriate.
By combining these assessments, we can determine whether a student has dyslexia, another learning difficulty or a different explanation altogether.
Why Some Students Are Diagnosed Later Than Others
Many bright students develop remarkable ways of compensating for their reading difficulties.
They memorise words instead of decoding them, rely heavily on context and use strong reasoning skills to hide weaknesses that have existed for years.
These strategies often work well in primary school. However, as students move into IGCSE, A Level, the IB Diploma or university, reading becomes faster, more technical and much less predictable. Compensation becomes increasingly difficult, and long-standing difficulties finally become apparent.
The CTOPP-2 is particularly effective at identifying these students because it includes tasks that cannot be solved through memorisation or guessing. Instead, it measures the underlying phonological skills directly.
For many families, this explains why a capable student has always seemed to work much harder than their peers.
Why Expert Test Administration Matters
The CTOPP-2 is individually administered and carefully standardised. Accurate testing requires precise timing, careful observation and expert interpretation.
This is especially important in multilingual students, where differences in pronunciation or accent should never be mistaken for evidence of dyslexia.
Our HCPC-registered Educational Psychologists are experienced in assessing students from international schools and understand how language background, educational history and cognitive ability influence performance.
Rather than interpreting scores in isolation, we consider the CTOPP-2 alongside every other assessment in the battery before reaching a diagnostic conclusion.
Your CTOPP-2 Assessment and Report
Whenever reading difficulties are identified, your Global Education Testing assessment includes the CTOPP-2 as part of our comprehensive Gold Standard battery.
Your report includes:
- Detailed analysis of phonological awareness, phonological memory and rapid naming
- Integration with cognitive ability and academic attainment testing
- A clear explanation of whether the findings support a diagnosis of dyslexia
- Practical recommendations for both school and home
- Examination access arrangement recommendations where appropriate
- A diagnosis based on recognised DSM-5-TR and ICD-11 criteria
Your completed report is delivered within 7 days and is backed by our Exam Board Acceptance Guarantee, giving families confidence that it exceeds the standards expected by international schools, examination boards and universities.