ACT Reading: Evaluate Paragraph Cohesion to Understand How Ideas Connect

Cohesion is the quality of sentences flowing smoothly and logically within a paragraph. Cohesive paragraphs use transitions (however, therefore, moreover), pronouns that refer clearly to previous nouns, and ideas that build on each other logically. Example (poor cohesion): "The study was conducted in 2023. Researchers interviewed 500 participants. Coffee is a popular beverage." The third sentence breaks cohesion by introducing an unrelated topic. Example (good cohesion): "The study was conducted in 2023. Researchers interviewed 500 participants about their health habits. The findings revealed surprising patterns in daily routines." Each sentence builds on the previous one; ideas flow logically. ACT Reading rewards students who recognize strong vs. weak cohesion and understand how transitions and pronouns maintain logical flow.

Strong cohesion makes paragraphs easy to follow and understand. Weak cohesion confuses readers and makes it hard to see how ideas connect. Authors use pronouns, transitions, and parallel structure to maintain cohesion.

Trap 1: Assuming a paragraph is cohesive because all sentences are about the same general topic. A paragraph on "technology" with sentences about smartphones, climate change, and online dating all touch on modern life but lack specific cohesion because they don't build on each other. Trap 2: Missing subtle breaks in cohesion. A paragraph might lose cohesion when a pronoun's reference becomes ambiguous, when a transition is missing, or when a sentence contradicts or abruptly shifts the main idea. Read each paragraph and ask: Do the sentences build logically? Do pronouns refer clearly? Do transitions connect ideas smoothly? If you hesitate, cohesion may be weak.

Mark transitions and pronouns as you read. Trace how each sentence connects to the previous one. If a sentence doesn't connect, cohesion is broken and you've likely found a key insight for answering organization or flow questions.

Paragraph 1: "The company faced declining sales in 2024. Management implemented a new marketing strategy. Within six months, the strategy yielded results. Customer engagement increased by 40%. The board praised the decision." Cohesion assessment: Strong. Sentences build logically (problem→solution→results→evaluation). Transitions are smooth. "The strategy" and "the decision" clearly refer to previous ideas. Paragraph 2: "Climate change threatens coastal cities. Scientists have warned about rising sea levels. Polar bears live in cold environments. Some governments are developing adaptation plans. These plans focus on infrastructure protection." Cohesion assessment: Weak in the middle. The polar bear sentence breaks cohesion by introducing an unrelated example. The paragraph would be stronger without it. The final sentences recover cohesion by focusing on government adaptation. Paragraph 1 maintains unity throughout. Paragraph 2 has a break that weakens overall flow.

Find five passages and assess cohesion for each paragraph. Mark where cohesion is strong and where it breaks. This practice trains you to recognize logical flow and spot organizational issues.

ACT Reading includes questions about how paragraphs are organized and how sentences connect. Once you develop sensitivity to paragraph cohesion, you'll understand passages more deeply and answer organization and flow questions with accuracy.

This week, assess cohesion in every paragraph you read. By test day, you'll instantly recognize strong vs. weak paragraph flow and answer cohesion-related questions confidently.