1.1 - Observation methods

Structured and unstructured recording

Observation is systematic watching and recording of behaviour rather than relying only on what people report about themselves.

In a structured observation, researchers decide in advance which behaviours they will record. A playground study might define “offering an object” as extending an object towards another child and record a tally whenever it happens. Clear behavioural categories make records more consistent and easier to compare. Researchers can count behaviour, but the count does not by itself reveal a child's motive.

In an unstructured observation, researchers make a broader descriptive record without a fixed set of categories determining what they notice. Detailed notes might capture how a new game develops, including unexpected acts that a checklist would miss. This can produce rich qualitative evidence, useful when little is known about the behaviour. It takes time to record and analyse, and different observers may select different details or interpretations.

Structured recording can miss behaviour outside its categories. Vague categories such as “being friendly” leave judgement to the observer; precise visible acts are preferable. A pilot observation can reveal omissions or ambiguity before the main study. Training observers with the same examples and comparing their independent records checks inter-observer reliability, the extent of agreement between observers. Agreement improves confidence in consistency but does not prove that a category validly measures a psychological concept: two observers could consistently mislabel an act.

Observation avoids some self-report problems, such as forgetting an event, but researchers can still show observer bias if expectations influence what they notice or code. Clear rules and, where possible, observers unaware of the prediction help reduce this.

Naturalistic and controlled settings

The setting of an observation concerns where behaviour occurs and how much the researcher arranges that situation.

A naturalistic observation records behaviour in its usual environment without arranging the situation to produce that behaviour. Watching everyday queuing at a bus stop can reveal how people normally negotiate space. Its everyday context may support ecological validity. Researchers cannot necessarily standardise crowding, weather or interruptions, and infrequent behaviours may take a long time to observe. These uncontrolled circumstances also make exact replication harder.

A controlled observation records behaviour in a situation arranged by the researcher. Researchers could invite pairs of adults into the same room and give each pair the same puzzle materials, then observe cooperation. Comparable materials, timings and opportunities make participants easier to compare and the procedure easier to repeat. Being invited into an arranged setting may change how people behave, so it may not represent everyday cooperation.

A controlled observation does not automatically become an experiment. Setting up one common puzzle situation for everyone does not manipulate an IV between conditions. If the researcher deliberately varies a condition to test its effect, the wider study can instead be experimental while using observation to measure its DV. Method of recording and overall research design are distinct decisions.

Participant and non-participant roles

The observer's role concerns whether the researcher joins the activity being studied.

In participant observation, the researcher takes part in the group or activity. Joining a community gardening group may help the observer understand relationships, routines and the meaning of members' actions. Access and trust can reveal details that a distant observer would miss. This does not give automatic access to every participant's private thoughts.

Participation can also change the behaviour being studied. If the researcher allocates jobs, the observed cooperation partly reflects that intervention. Close involvement can make detached judgement harder, and taking part may prevent accurate notes at the time. Retrospective notes are vulnerable to memory errors. The researcher should distinguish observed acts from interpretations and reflect on their influence.

In non-participant observation, the researcher observes without joining the activity. An observer sitting apart from the gardening group can concentrate on recording each agreed category and may be less involved in its decisions. However, they may misunderstand an action without the group's context, and their visible presence can still affect behaviour. Non-participation reduces one source of involvement; it does not guarantee objectivity or invisibility.

The role is independent of the recording method and setting. A participant observer can use predefined categories, while a non-participant observer can write unstructured notes. Researchers choose the combination that fits their question and access, then explain its costs.

Overt and covert observation

Participants' awareness is separate from the setting and from whether the observer joins the activity.

In overt observation, people know they are being observed for research. This makes informed consent, information about withdrawal and discussion of recording easier to arrange. People may change behaviour because of that awareness: workers may cooperate unusually carefully while being observed. This reactivity can reduce the validity of conclusions about their normal behaviour. Familiarisation with the observer may reduce reactivity, but it does not guarantee its absence.

In covert observation, people do not know they are being observed for research. Reduced awareness may produce more usual behaviour, but it makes informed consent and withdrawal difficult and can involve deception. Privacy still matters. Observation without consent in a public setting requires careful ethical justification and respect for reasonable expectations of being seen by strangers; a supposedly public location does not make all behaviour appropriate to record. Private conversations, identifiable footage and sensitive behaviour need particular protection. Any covert plan needs ethical scrutiny, risk reduction and consideration of less intrusive alternatives.

An observer can be overt and participant, such as a researcher who openly joins a gardening group, or covert and non-participant. These labels answer different questions. A full description might be “structured, naturalistic, non-participant and overt”: categories are fixed, normal activity is watched, the observer does not join, and people know about the research.

The strongest evaluation links a feature to the purpose of the research. For ordinary cooperation, overt consent is an ethical strength, but awareness could alter precisely the spontaneous behaviour being measured. Neither covert nor overt is always the best choice.