Difficulty: Intermediate | Prerequisites: The Writing Process and Thesis Statements notes
Causal analysis explains why something happens by tracing its causes, its effects, or both. Comparison writing places two subjects side by side to reveal meaningful similarities and differences. Both modes require a clear thesis and an organised structure so the reader can follow the logic without getting lost.
Causal analysis
An essay that examines the causes, the effects, or the causal relationship between events or phenomena. In simple terms, it answers "why did this happen?" or "what resulted from this?"
Cause
An event, condition, or action that brings about a result. Causes can be immediate (the spark that set things off) or underlying (the deeper conditions that made the event possible).
Effect
The outcome or consequence produced by a cause. Effects can be short-term or long-term, direct or indirect.
Causal chain
A sequence where one cause produces an effect, which in turn becomes the cause of the next effect, and so on. Think of it as a line of dominoes: each one falls because the previous one struck it.
Correlation vs. causation
Correlation means two things tend to occur together. Causation means one thing directly produces the other. The fact that two events coincide does not prove that one caused the other.
Comparison (rhetorical mode)
An essay that examines the similarities and differences between two (or occasionally more) subjects in order to make a meaningful point. The point is never "these two things are similar and different"; the thesis must say something specific about what the comparison reveals.
Block method (subject-by-subject)
An organisational pattern for comparison essays where the writer discusses all points about Subject A first, then all points about Subject B. Works best for shorter papers or when subjects are very different.
Point-by-point method
An organisational pattern where the writer alternates between the two subjects within each point of comparison. Works best for longer papers or when subjects share many comparable features.
Basis of comparison
The overarching reason or framework that makes comparing two subjects meaningful. Without a clear basis, the comparison reads as a random list of similarities and differences.
The causal analysis paper in this course is 500 to 600 words (roughly two to three pages) and worth 150 points (15% of your final grade).
Three types of causal analysis
Causes only: "What caused X?" (e.g., what causes first-year students to drop out?)
Effects only: "What are the effects of X?" (e.g., what are the effects of sleep deprivation on academic performance?)
Causal chain: "How does X lead to Y, which leads to Z?"
Building the argument
Your thesis should clearly state the causal relationship you are arguing for
Each body paragraph should present one cause or one effect, with evidence
Move from the most obvious cause/effect to the most significant, or use chronological order if a causal chain is involved
Provide concrete evidence: statistics, examples, expert testimony, or logical reasoning
Distinguishing causes from effects
Ask: "If I remove this factor, would the result still occur?" If yes, it is probably not a true cause
Watch for the post hoc fallacy: just because B followed A does not mean A caused B
Consider whether a cause is necessary (must be present for the effect to occur), sufficient (can produce the effect on its own), or contributory (increases the likelihood but is not solely responsible)
Structure
Introduction: hook, background context, thesis stating the causal claim
Body paragraphs: one cause or effect per paragraph, supported with evidence, connected by transitions ("as a result," "consequently," "because of this")
Conclusion: restate the thesis in different words, discuss broader implications
Real-world application
Causal reasoning is the backbone of problem-solving in any field. Doctors diagnose by identifying causes of symptoms. Engineers analyse why systems fail. Policy analysts trace the effects of legislation. The ability to reason clearly about causes and effects serves you well beyond this course.
The comparison paper in this course is 800 to 1,000 words (three to four pages) and worth 150 points (15% of your final grade).
Choosing subjects to compare
The two subjects must belong to the same general category (two restaurants, two policies, two approaches to a problem)
The comparison must have a purpose beyond listing similarities and differences; your thesis should state what the comparison reveals or argues
Ask: "So what?" If the answer is "they are similar in some ways and different in others," the comparison lacks a point
Block method (subject-by-subject)
Discuss all relevant points about Subject A in the first half of the essay
Then discuss all the same points about Subject B in the second half
Advantages: simpler to organise; gives a complete picture of each subject
Disadvantages: the reader must hold Subject A in memory while reading about Subject B; harder to draw direct comparisons
Best for shorter papers or when subjects differ significantly
Point-by-point method
Organise the essay by points of comparison rather than by subject
Each body paragraph addresses one point, discussing both Subject A and Subject B within that paragraph
Advantages: makes direct comparisons easy for the reader to follow; works well for longer papers
Disadvantages: can feel repetitive if not handled with varied sentence structures
This is generally the stronger method for a paper of 800 to 1,000 words
Transitions in comparison writing
Similarity: similarly, likewise, in the same way, both, just as
Difference: however, in contrast, on the other hand, whereas, unlike, while
Transitions do the connective work between your subjects; without them, the reader cannot see the relationship you are drawing
Structure
Introduction: introduce both subjects, establish the basis of comparison, state the thesis
Body: organised by block or point-by-point method, with clear transitions
Conclusion: restate the thesis, explain what the comparison ultimately reveals
Real-world application
Comparison is a fundamental decision-making tool. Consumers compare products before purchasing. Managers compare strategies before acting. Researchers compare methodologies. Writing a comparison paper trains you to evaluate options systematically rather than relying on gut feeling.
"Correlation proves causation." Two things happening together or in sequence does not prove that one causes the other. Always look for alternative explanations or confounding factors.
"A causal analysis paper is just a list of causes." Each cause needs evidence and reasoning, not just a label. The paper should build an argument, not a catalogue.
"A comparison essay should give equal space to similarities and differences." The balance depends on your thesis. If your argument is about how two things that seem similar are actually quite different, the differences will rightly receive more space.
"The block method and the point-by-point method are equally good for every paper." The point-by-point method is usually stronger for longer papers because it keeps both subjects visible throughout. The block method works for shorter papers but can leave the reader doing the comparative work themselves.
⚠️ The causal analysis paper requires a formal outline and a peer review workshop before the final draft. Missing the workshop costs you 25 points.
⚠️ For the comparison paper, you must choose an organisational method (block or point-by-point) and apply it consistently. Switching methods mid-paper is a structural error.
⚠️ Both papers must include a clear, arguable thesis. A thesis that merely announces the topic ("I will compare X and Y") is not sufficient.
⚠️ Subject-verb agreement (covered during the causal analysis weeks) and sentence fragments (covered during comparison weeks) are grammar topics likely to appear on quizzes during these units.
True or false: If event B always follows event A, then A must cause B.
Fill in the blank: The two main organisational methods for a comparison essay are the ______ method and the ______ method.
True or false: A comparison essay thesis should state what the comparison reveals, not just announce the two subjects.
Fill in the blank: A cause that increases the likelihood of an effect but cannot produce it alone is called a ______ cause.
True or false: The block method works best for longer comparison papers.
Answers: 1. False (post hoc fallacy; correlation is not causation). 2. Block (subject-by-subject) and point-by-point. 3. True. 4. Contributory. 5. False (point-by-point is generally stronger for longer papers).
Q: What is the post hoc fallacy, and why is it relevant to causal analysis?
A: The post hoc fallacy (short for post hoc ergo propter hoc, "after this, therefore because of this") is the error of assuming that because event B followed event A, A must have caused B. It is relevant because causal analysis requires you to demonstrate the mechanism of causation, not just the sequence of events.
Q: When should you use the point-by-point method rather than the block method?
A: Use point-by-point when the paper is longer (three or more pages), when the subjects share several comparable features, and when you want the reader to see direct comparisons within each paragraph rather than having to remember details from earlier sections.
Q: What is a basis of comparison, and why does it matter?
A: The basis of comparison is the overarching framework or reason that makes the comparison meaningful. Without it, the essay becomes a disjointed list. For example, comparing two restaurants is meaningless on its own; comparing them to determine which offers better value for students on a budget gives the comparison a clear purpose.
Q: Name three types of causal analysis essays.
A: Causes only (what caused X), effects only (what are the effects of X), and causal chain (how X leads to Y leads to Z).
Causal analysis connects to the evaluation paper later in the course, because evaluating something often requires understanding what causes it to succeed or fail. Comparison skills feed directly into the evaluation paper as well, where you may compare your subject against criteria or against competing options. Both modes rely on the thesis and paragraph-development skills from the foundational writing process notes.
causal analysis, cause and effect essay, cause and effect, causal chain, post hoc fallacy, correlation vs causation, contributory cause, necessary cause, sufficient cause, comparison essay, contrast essay, compare and contrast, block method, subject-by-subject, point-by-point method, basis of comparison, transitions, rhetorical modes, expository writing, ENG 1510, Composition I, Grant and Lee: A Study in Contrasts