Cause and Effect notes

MDCAT Analytical and Logical Reasoning

Cause and effect questions test whether one statement produces another, whether both statements arise from a common cause, or whether they are unrelated. The correct relationship is identified by checking time order, logical connection, direct influence, and whether another explanation is more natural.

Meaning of Cause and Effect

A cause is an event, condition, decision, or action that produces or influences another event. An effect is the result or consequence produced by the cause. The cause normally happens before the effect, although both statements may sometimes describe results of a previous event.

In these questions, two statements are given. Your task is not to judge whether the statements are true in real life. You must identify the most reasonable relationship between them using only the information and normal logic provided.

Cause means the reason or condition responsible for an event.
Effect means the result produced by a cause.
A cause must normally occur before its effect.
Example: A new virus outbreak caused tourists to cancel their travel plans.
Example: Record-breaking heat caused a school to extend its summer vacation.
A strong cause explains why the effect occurred more directly than a weak or imaginary explanation.

Main Types of Relationships

Most cause and effect questions use a small number of relationships. The statements may show that Statement I causes Statement II, Statement II causes Statement I, both statements are effects of independent causes, both are effects of a common cause, or the statements are unrelated.

Read both statements carefully before selecting an option. Do not select a relationship only because the statements are connected by topic. A relationship requires a logical connection in which one event explains or influences the other.

Statement I is the cause and Statement II is its effect.
Statement II is the cause and Statement I is its effect.
Both statements are effects of independent causes.
Both statements are effects of a common cause.
Both statements are independent causes without a direct relationship.
Both statements are unrelated.
A statement may itself be an effect and may also cause another event.

When Statement I Causes Statement II

Statement I is the cause when it logically produces, encourages, or explains Statement II. The effect usually happens after the cause. Look for a clear action followed by a natural result.

For example, increased unemployment can lead to a large number of people applying for a job. Similarly, the death of a baby may cause a person to desire another child immediately, which may then lead to an unlawful action.

Unprecedented unemployment was followed by many applications for a bank manager's post.
A person wanted another baby immediately after her baby's death, and this desire led to abducting an infant.
A major cause should be sufficient to explain the later event.
The cause need not be the only possible cause, but it should be the most direct explanation.
The time sequence should support Statement I before Statement II.
Do not reverse the relationship merely because both statements concern the same subject.

When Statement II Causes Statement I

Statement II is the cause when it provides the reason for Statement I. This is one of the most common patterns. The second statement may describe a government decision, public action, natural event, or earlier condition that produces the first statement.

For example, an increase in government duty can cause car manufacturers to increase prices. A protest by ministers can cause the government to withdraw a price increase.

An increase in duty on mid-sized cars caused companies to increase their prices.
Ministerial resignations in protest caused the government to roll back the increase in cooking gas and kerosene prices.
A new virus outbreak caused tourists to cancel their travel plans.
Record-breaking heat caused a school to extend its summer vacation.
A training programme for literacy volunteers contributed to a rising literacy rate.
A petition by teachers caused university authorities to ban mobile phones in colleges.
Large foreign demand for Pakistani steel caused steel-producing companies to earn greater profits.

Direct Cause and Effect Clues

Certain words and situations help identify a direct relationship. Actions such as increasing, reducing, banning, opening, closing, cancelling, extending, appointing, and protesting often have a clear result. Natural events such as heat, rain, disease outbreaks, and storms can also produce direct effects.

Ask the question: If Statement II did not occur, would Statement I probably still occur? If the answer is no or less likely, Statement II may be the cause of Statement I. Then check whether the sequence is sensible.

Government or institutional decisions often produce immediate policy effects.
A price increase may lead to protests, resignations, reduced demand, or a later rollback.
A disease outbreak may lead to cancelled travel, hospitalisation, or public restrictions.
An educational training programme may improve the performance of campaign workers and increase literacy.
A long power outage is not normally caused by pleasant weather.
A police cordon may be an effect of a truck overturning and blocking a road.
Maintenance failure is a direct cause of equipment accidents because neglected equipment is more likely to malfunction.

Independent Causes and Independent Effects

Two statements have independent causes when each is produced by a separate reason and neither statement causes the other. The statements may occur at the same time or in the same general area, but there is no direct logical link between them.

For example, schools may close because of severe weather, while parents may withdraw children because of poor teaching or safety concerns. Both statements are effects, but their causes are different.

School closure and parents withdrawing children may be effects of independent causes.
A fall in water-borne diseases and the opening of new hospitals can both occur without one causing the other.
A power outage and pleasant weather are unrelated events in the given situation.
Independent effects share no direct cause and effect link with each other.
Similar location or timing does not prove dependence.
A statement can be an independent cause rather than an effect if it does not result from the other statement.
Choose independent causes or effects only when no reasonable direct connection exists.

Common Cause and Two Causes Producing One Effect

Sometimes neither statement causes the other. Instead, both statements are effects of one earlier event or condition. This is called a common cause relationship. The common cause may not be directly written in the statements, so it must be inferred carefully.

Another pattern is that two separate causes combine to produce one event. In standard questions, focus on whether the given statements themselves are related. If both describe results of an unstated situation, select the common cause option.

A company's profit may increase and its workforce may decrease because of a common cause such as a cost-cutting or restructuring policy.
The two statements are effects, not necessarily causes of each other, when both follow from one earlier decision.
A reduction in workforce does not automatically cause a 40 percent increase in profit.
The same event may produce economic, social, and administrative effects at the same time.
Do not treat two events as a common-cause pair unless one plausible earlier condition explains both.
Common cause differs from independent causes because independent causes arise from separate reasons.

A Method for Solving Questions

Use a fixed sequence when solving. First identify the main action, event, or condition in each statement. Next arrange the events in time. Then test whether one statement directly explains the other. If not, check for a common cause or independent causes.

Avoid adding information that is not given. Use ordinary practical reasoning, but do not create a complicated story to force a relationship. The simplest logical explanation is usually the correct one.

Step 1: Read Statement I and Statement II separately.
Step 2: Underline the main event or decision in each statement.
Step 3: Ask which event could naturally happen first.
Step 4: Test whether Statement I can produce Statement II.
Step 5: Test whether Statement II can produce Statement I.
Step 6: If neither causes the other, check for a common cause.
Step 7: If there is no common cause, select independent or unrelated statements.
Step 8: Match the relationship with the exact option wording.

Important Distinctions and Examples

Some statements may look connected because they concern the same institution, city, country, or topic. This is not enough. A valid relationship needs a reasonable mechanism. The result must follow from the cause in a natural way.

Use the direction of influence carefully. For example, if ministers resign because of a price hike, the resignation is the effect. If the government then reverses the hike because of the resignations, the reversal becomes a later effect of the resignation.

Price hike followed by ministerial resignation: the hike is the cause of resignation.
Ministerial resignation in protest followed by price rollback: resignation is the cause of rollback.
Truck overturned on a road followed by police cordon: truck accident is the cause of cordon.
Training of literacy volunteers followed by improved literacy rate: training is the cause and rising literacy is the effect.
Opening hospitals and reduction in disease cases may be independent effects unless a direct link is clearly established.
A pleasant weather report does not explain a long power outage.
A petition by teachers followed by a phone ban shows Statement II as the cause of Statement I.

Common Errors to Avoid

Many wrong answers result from reversing the sequence or assuming that any two related facts have a cause and effect relationship. A statement describing a response, consequence, or policy change is often the effect of an earlier event.

Another error is using personal opinions instead of the most reasonable interpretation. The question requires a logical relationship, not a moral judgement about the people or institutions mentioned.

Do not confuse a reason with its result.
Do not assume that the first statement is always the cause.
Do not assume that the second statement is always the effect.
Do not call two statements independent merely because their link is not stated word for word.
Do not invent an unmentioned event when a direct relationship is already clear.
Do not treat sequence alone as proof. The events must also be logically connected.
Do not confuse common cause with independent causes.
Remember that an effect can later become a cause of another event.

Key terms

Cause: An event, condition, or action that produces or influences another event.
Effect: The result or consequence produced by a cause.
Direct cause: A cause that leads naturally and clearly to the stated result.
Cause and effect relationship: A logical connection in which one statement explains or produces the other.
Statement I is the cause: The first statement occurs earlier and produces the event described in Statement II.
Statement II is the cause: The second statement provides the reason for the event described in Statement I.
Independent causes: Separate reasons that produce two events without one event causing the other.
Independent effects: Two results produced by separate causes.
Common cause: One earlier event or condition that produces both given statements.
Unrelated statements: Statements with no reasonable direct, common, or indirect logical connection.
Time sequence: The order in which the cause and effect occur.
Consequence: An outcome that follows an action or event.
Inference: A conclusion reached from the facts and logical connection in the statements.
Reversal of relationship: The mistake of identifying an effect as the cause or a cause as the effect.

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Analytical and Logical Reasoning shortcuts

Choosing the stronger supporting argument

Choose the option that directly explains why the claim is true. Prefer relevant evidence with a clear link to the claim, not a statement that is merely related.

Identify the claim and ask, “Why would this make the claim true?”
Reject personal opinions, unrelated facts and extreme statements.
Example: “Teachers should be paid more” is supported by “They shape future generations.”

This shortcut does not apply when the option gives direct statistical or experimental evidence that is stronger than a general reason.

Finding the pattern in letter and number series

Check letters and numbers separately. Look for equal increases, alternating changes, multiplication, or a repeating pattern.

Convert letters to positions if needed, such as A = 1 and D = 4.
Find the change in the letters and in the numbers independently.
Example: A2, D4, G6, J8 has letters increasing by 3 and numbers by 2, so the answer is M10.

Do not assume a simple addition pattern if alternating or multiplication patterns fit all the given terms.

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