levo

Practical Activities and the Nature of Science

Cause and effect, falsification and replicability

  • 3 things to know
  • Component 01

Overview

Recall questions on establishing cause and effect, why correlation does not show causation, falsification and unfalsifiable theories, which hypothesis is tested, and what makes a study replicable.

What you need to know

Answer each one before you reveal it.

Your recallNot started
Study

Why does a strong correlation between two variables not demonstrate cause and effect?

Key term

Which research method allows cause and effect to be established, and why?

Key term

Define falsification.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What does it mean to establish a cause-and-effect relationship?

    Model answer

    It means showing that a change in one variable is directly responsible for a change in another.

  2. 2

    Which research method allows cause and effect to be established, and why?

    Model answer

    The experiment, because the independent variable is deliberately manipulated while other variables are controlled, so any change in the dependent variable can be attributed to it.

  3. 3

    Why does a strong correlation between two variables not demonstrate cause and effect?

    Model answer

    Neither variable has been manipulated and extraneous variables are uncontrolled, so a third variable may be responsible or the causal direction may be reversed.

  4. 4

    Define falsification.

    Model answer

    The principle that a theory is only scientific if it is capable of being proved wrong by evidence.

  5. 5

    Why do scientists try to disprove rather than confirm their theories?

    Model answer

    No number of confirming observations can prove a general theory true, but a single disconfirming result is enough to show it is false.

  6. 6

    Why is a theory that can explain every possible outcome regarded as unscientific?

    Model answer

    Because no observation could ever contradict it, so it cannot be tested or falsified.

Other ways to work this

The same content, four other ways.

What is inside Levo

Six ways to work the same material.

1Closed book
2Open book
3Closed book

The 3-step method, run for you

Answer cold, learn it, then prove it stuck. Levo tracks the jump between your first attempt and your last.

Research Methods and Techniques
Planning and Conducting Research
Data Recording, Analysis and Presentation
Report Writing and Scientific Communication

Cram a whole paper in one sitting

Sort every topic into what you know and what you do not, then drill only the weak ones.

The tests are a old.
centurydecadeyear

Blank Blitz makes facts automatic

Rapid timed gap-fills on the terms and numbers you need to recall without thinking.

APunishment requires deprivation, loss of autonomy and stigma.
BReform requires trust, responsibility and self-respect.
CThe regime that achieves one tends to undermine the other.

Build It gets the exam shape right

Assemble a full-mark answer from its marking points, in the order an examiner wants them.

Range means the highest score minus the lowest score.
TrueFalse

Test It catches misconceptions

Spot the fault in a statement. The traps are the mistakes students actually make.

721941163128510

Brain Breaks between sessions

Short focus games to reset attention, so the next set lands better than the last.

Every question in Practical Activities and the Nature of Science, on a schedule.

Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.

Or £46 a year, about £3.83 a month. Cancel anytime.