What are the main types of observation and how are they designed?
Observational techniques: naturalistic and controlled, covert and overt, participant and non-participant. Observational design: behavioural categories, event and time sampling.
Covers AQA 4.7 observational techniques: naturalistic and controlled, covert and overt, participant and non-participant observation, and observational design (behavioural categories, event and time sampling).
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What this dot point is asking
AQA wants you to describe the types of observation and the design choices: behavioural categories, event sampling and time sampling. The exam skill is to apply the right observation type and sampling method to a scenario and to explain how reliability is established.
Types of observation
Observations are categorised along three independent dimensions, and you should treat them as separate choices rather than a single label. The naturalistic versus controlled dimension concerns the setting: a naturalistic observation watches behaviour in its everyday environment (high ecological validity but low control over extraneous variables), while a controlled observation watches behaviour in a structured setting such as a lab (more control but less natural). The covert versus overt dimension concerns awareness: a covert observation watches participants without their knowledge, which reduces demand characteristics and gives more natural behaviour but raises ethical concerns about consent and privacy, while an overt observation, where participants know they are watched, is more ethical but risks participants changing their behaviour. The participant versus non-participant dimension concerns the observer's role: in a participant observation the observer joins the group being studied, gaining insight but risking loss of objectivity, while in a non-participant observation the observer stays separate, staying objective but losing closeness. A single study makes a choice on each dimension (for example a naturalistic, covert, non-participant observation).
Observational design
Designing an observation begins with operationalising the target behaviour into behavioural categories: clearly defined, observable, mutually exclusive components, so that "aggression" might be broken into hitting, kicking, pushing and verbal threats. Good categories must be specific and not overlap, so that any observer would code the same behaviour the same way. The behaviour is then recorded using a sampling method. Event sampling counts every occurrence of each target behaviour throughout the observation, which captures everything but can be overwhelming if behaviour is frequent. Time sampling records what is happening only at fixed intervals (for example every 30 seconds), which is manageable but can miss behaviours that occur between intervals. To check that the observation is reliable, two or more observers record independently using the same categories, and inter-observer reliability is assessed by correlating their records; a correlation of around or higher indicates good agreement and shows the coding is consistent rather than subjective.
Exam-style practice questions
Practice questions written in the style of AQA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
AQA 20194 marksExplain the difference between event sampling and time sampling, and give one limitation of time sampling.Show worked answer →
A 4-mark item (about 2 AO1 for the difference, 2 AO3 for the limitation).
Event sampling involves recording every time a particular target behaviour occurs during the observation period, producing a count of each behaviour. Time sampling involves recording what behaviour is occurring at fixed time intervals (for example, noting the behaviour every 30 seconds), producing a snapshot at each interval.
Limitation of time sampling: because behaviour is only recorded at set intervals, behaviours that happen between the intervals are missed, so the sample may be unrepresentative of what actually happened. A full-mark answer distinguishes counting each occurrence (event) from recording at set intervals (time) and develops the "missed behaviour" limitation.
AQA 20216 marksExplain how a researcher could design an observation to study aggression in a school playground, referring to behavioural categories and reliability.Show worked answer →
A 6-mark item, roughly 3 AO1 and 3 AO2 application.
The researcher should first operationalise aggression into clear, observable behavioural categories that do not overlap, such as hitting, pushing, kicking and verbal threats, so observers know exactly what to record. They could then use event sampling (counting each aggressive act) or time sampling (recording aggression at fixed intervals), and a naturalistic, covert, non-participant observation would reduce demand characteristics in the playground.
To check reliability, two or more observers should record independently using the same categories, and inter-observer reliability is assessed by correlating their records (a correlation of about or above indicates good agreement). A full-mark answer applies behavioural categories to aggression and explains how inter-observer reliability would be established.
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Sources & how we know this
- AQA A-level Psychology (7182) specification — AQA (2015)