This week has decoded all four IELTS speaking criteria individually. Today: how they interact. Each criterion is scored separately and weighted equally at 25%. But in practice, they influence each other — which means fixing your weakest criterion creates a positive cascade across the others.
Improving one criterion systematically lifts the others
Better fluency creates more natural pacing. Natural pacing allows intonation to vary. Varied intonation improves pronunciation scores.
Richer vocabulary makes answers more precise. Precision reduces the need to repeat or self-correct. Less repetition improves fluency scores.
More complex grammar enables longer, better-structured sentences. Structured sentences improve coherence. Coherence is the second component of the first criterion.
Clearer pronunciation means the examiner can follow your ideas without effort. They follow your ideas more easily. Your answers feel more coherent and structured as a result.
Self-diagnosis before practice — the highest-leverage step
Record yourself answering three IELTS questions. For each recording, assign a rough band score (5, 6, or 7) to each of the four criteria. Be honest. The criterion with the consistently lowest score is your primary focus for the next week.
Trying to improve all four simultaneously dilutes your effort. One focused week on your weakest criterion produces more measurable progress than a month of unfocused practice across all four.
One criterion per week — all four in a month
Week 1: Fluency (reduce fillers, practise speaking at length). Week 2: Lexical Resource (topic vocabulary, paraphrase). Week 3: Grammar (deploy complex structures deliberately). Week 4: Pronunciation (word stress and intonation).
After four weeks, each criterion has received a week of focused attention. Your overall score will reflect systematic improvement — not the random gains from unfocused practice.