Observational Design (College Board AP® Psychology): Study Guide

Structured & unstructured observations

Structured observation

• A structured observation is used when the researcher wants to observe specific, predetermined behaviors in a large sample or busy environment where many different behaviors are likely to occur

  • Rather than recording everything that happens, the researcher focuses only on a limited set of clearly defined behaviors of interest

• The emphasis in structured observation is on gathering quantitative data, e.g.

  • The number of times a child displays aggressive behavior toward a peer during a 30-minute recess period

  • The frequency with which drivers stop at a crosswalk when a pedestrian is waiting

  • The number of times a student raises their hand to answer a question during a one-hour class

Evaluation of structured observations

Strengths

• Quantitative data can be easily analyzed, presented graphically, and converted to statistics

  • This is a strength as it allows trends and frequencies of behavior to be identified across large samples

  • This increases the reliability of the results

• Using predetermined behavioral categories keeps the researcher focused

  • They can disregard behaviors that fall outside the categories ensuring that what is being recorded is directly relevant to the research aim

Limitations

• Quantitative data reveals what behavior occurred but not why

  • This means that structured observations lack explanatory power as they produce findings that are limited in depth and insight

• Predetermined categories mean the researcher cannot record behaviors that fall outside them, even if those behaviors are interesting and relevant

  • This limits the usefulness and validity of structured observations

Unstructured observation

• An unstructured observation is used when the researcher wants to observe the full range of behaviors occurring in a small sample or more intimate setting where interpersonal interaction is the focus

  • The researcher does not use predetermined behavioral categories — instead they record everything that occurs during the observation session

• The emphasis in unstructured observation is on gathering qualitative data, e.g.

  • verbal and non-verbal communication between participants

  • the quality and tone of conversation (e.g. light-hearted, serious, aggressive)

  • how participants use and move within the environment

• Examples of research scenarios suited to unstructured observation:

  • Observing how young children interact when playing with gender-stereotyped toys

  • Observing how couples communicate when discussing a source of conflict

Evaluation of unstructured observations

Strengths

• Unstructured observations produce rich, detailed, in-depth qualitative data that captures the complexity of behavior

  • This is high in ecological validity as it reflects the genuine, unfiltered experience of the participants

• The flexible, open-ended nature of unstructured observation allows the researcher to follow unexpected or particularly significant behaviors as they emerge

  • This can generate new insights and research questions

Limitations

• The highly subjective nature of unstructured observations increases the risk that the researcher loses objectivity

  • They may become too close to the participants, succumb to confirmation bias, or unconsciously overlook behaviors that do not align with their expectations

  • This reduces the reliability of the findings

• Analyzing the data from unstructured observations is time-consuming and depends heavily on the researcher's interpretation

  • This introduces subjectivity into the findings and reduces the validity of the published conclusions

Behavioral categories & inter-rater reliability

Behavioral categories

• Behavioral categories are used in structured observations to define and record the specific behaviors the researcher is interested in

• Behavioral categories must:

  • only include directly observable behaviors — nothing that requires inference or interpretation

  • be clearly operationally defined so that there is no ambiguity about what counts as an instance of that behavior

  • be mutually exclusive — each behavior should fit into only one category

• Examples of well-operationalized behavioral categories in a study on aggression include:

  • "Physical aggression" = punching, kicking, or shoving another person

  • "Verbal aggression" = shouting, name-calling, or threatening another person

  • "Non-aggressive behavior" = smiling, sharing, or cooperating with another person

• Behavioral categories can be further subdivided for greater precision, e.g.

  • Physical aggression directed toward a peer of the same gender

  • Physical aggression directed toward a peer of a different gender

Inter-rater reliability

• Even when behavioral categories are clearly defined, observations can still be affected by researcher bias

  • Different observers may interpret the same behavior differently

• Inter-rater reliability is the level of consistency between two or more trained observers recording the same observation independently

• Inter-rater reliability is established in the following ways:

  • All observers agree on the behavioral categories and how they will be recorded before the observation begins

  • Each observer conducts the observation independently to avoid one observer influencing another

  • After the observation, the two independent data sets are compared

  • A correlation is calculated between the two sets of scores — a strong positive correlation indicates good inter-rater reliability

  • If inter-rater reliability is low, the behavioral categories are reviewed and refined before the observation is conducted again

• Establishing good inter-rater reliability reduces the risk that researcher bias has distorted the findings and increases confidence in the reliability of the conclusions

Evaluation of behavioral categories and inter-rater reliability

Strengths

• The use of clearly defined, unambiguous behavior categories allow the researcher to record behavior objectively

  • Eliminating subjectivity moves the process closer to the scientific method

• Inter-rater reliability ensures that the findings are consistent across observers

  • This strengthens the reliability of the data and reduces the likelihood that the findings will be challenged during peer review

Limitations

• Predetermined behavioral categories may be too restrictive

  • If behaviors occur during the observation that do not fit any of the categories, they cannot be recorded

  • This means the findings may not accurately represent what actually occurred, reducing validity

• Inter-rater reliability does not account for the possibility that observers simply guessed when scoring ambiguous behaviors

  • High agreement between observers does not necessarily mean the categories are being applied correctly

  • This overestimates the true reliability of the observation

Event sampling & time sampling

• It can be difficult to observe and record all behaviors continuously throughout an observation session

• Therefore researchers use sampling procedures to organize data collection

• These include:

  • event sampling

  • time sampling

Event sampling

• The researcher records every time a behavior from a specific behavioral category occurs throughout the entire observation session, e.g.

  • recording every instance of physical aggression during a 60-minute recess period

  • tallying every time a driver uses their phone while waiting at a traffic light

Time sampling

• The researcher records all behaviors that occur during a set time interval at regular points throughout the observation session, e.g.

  • recording all behaviors for 20 seconds every 10 minutes across a 2-hour observation

  • recording all behaviors for 15 minutes every 3 hours across a two-day observation

• The researcher determines which time interval is most appropriate for the specific study

Evaluation of event sampling & time sampling

Strengths

• Event sampling ensures that specific behaviors will not be missed or overlooked

  • Every instance is recorded as it occurs, producing a complete and accurate frequency count

• Time sampling gives the researcher flexibility to record any behaviors that occur within the time window

  • It also offers researchers the opportunity to record unexpected behaviors which may generate new research questions

Limitations

• If too many target behaviors occur simultaneously or are particularly complex, event sampling may fail to capture all of them accurately

  • This limits the validity of the method as it would not provide a true reflection of what occurred during the observation session

• Time sampling may miss any behaviors that occur outside of the designated time windows

  • Some behaviors may be over- or underrepresented in the findings, which limits the validity of the conclusions drawn