A more valid, reliable and holistic report
What does “valid” mean in an expert report?
A report is not made more valid simply by including more tests or more documents.
Validity depends on whether the methods and evidence actually address the question being asked.
My approach is designed to strengthen validity by:
- defining the precise question before selecting an assessment method;
- matching the method to the relevant psychological, educational or occupational issue;
- considering real-world school or workplace demands;
- comparing assessment findings with records and observed functioning;
- avoiding conclusions that extend beyond what the evidence can support;
- explaining where the available evidence does not permit a definite opinion.
What does “reliable” mean?
A reliable opinion should have a reasoning process that another professional can follow, examine and challenge.
The report therefore aims to provide:
- a clear record of the materials considered;
- transparent assessment methods;
- appropriate use of standardised measures where relevant;
- an explanation of the weight placed on different evidence;
- separation of fact, reported information and professional inference;
- consideration of inconsistent or contradictory evidence;
- consideration of plausible alternative explanations;
- clear limitations and qualifications;
- an explicit path from evidence to conclusion.
What does “holistic” mean?
Holistic does not mean vague or all-encompassing.
It means considering the interaction between:
The person
Strengths, needs, functioning, psychological characteristics, history and goals.
The task
The actual learning, assessment, communication, organisational or work demands being placed on the individual.
The environment
The school, college, workplace, home or community conditions in which the person is expected to function.
The system
The EHCP, provision, management arrangements, adjustments, professional input and decision-making structures around the person.
Time
How the situation developed, what changed, what support was available and how earlier events may affect the current and future position.
This person–task–environment–system approach is intended to produce recommendations that are connected to the evidence and usable in practice.