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Apply your understanding of independent and dependent variables to new situations.

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Cambridge IGCSE PsychologyResearch methods

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Apply your understanding of independent and dependent variables to new situations

This point belongs to T he features of an experiment., especially T he features of an experiment. outcomes.
You need to be able to apply your understanding of independent and dependent variables to new situations.
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SuggestJustify

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This objective helps connect T he features of an experiment. outcomes to exam-style questions, flashcards, and revision notes for T he features of an experiment..

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Paper 1 structured question: T he features of an experiment.

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Description

Study on Sleep and Performance

Participants are divided into three groups: one group sleeps for 4 hours, another for 6 hours, and the last for 8 hours. Their performance on a cognitive test is measured after each sleep duration.

Sleep Duration (hours)	Cognitive Test Score
4	75
6	85
8	95

a
Define the independent variable in this study.
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[1]

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Related learning objectives

An experiment is a method used to study how one variable affects another under controlled conditions. Knowledge of different experiment types, such as laboratory and field experiments, is not required.
T he features of an experiment. outcomes
Apply your understanding of experiments to new situations.
T he features of an experiment. outcomes
The independent variable is the one that is manipulated in an experiment and can have multiple conditions or levels.
T he features of an experiment. outcomes
The dependent variable is the one that is measured in an experiment, which can be assessed through various methods such as tests, observations, questionnaires, and interviews.
T he features of an experiment. outcomes
Operationalisation involves defining a variable so that it can be accurately measured or observed, whether it is manipulated (IV) or measured (DV).
T he features of an experiment. outcomes

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