observational research. methods without intervention naturalistic observation: the study of on-...
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Observational Research
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Methods without Intervention
• Naturalistic Observation: the study of on-going behavior in the natural environment
• No intervention by the observer
• Uninterrupted stream of behavior
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• The observer is “unobtrusive”
• Eliminates “reactive behavior”
• Reactive behavior is behavior that is different than normal because of an awareness of being watched
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• “natural environment” is the environment in which the behavior normally occurs
• This could be a city sidewalk or a preschool or a desert
• To be unobtrusive, the observer (O) must “blend in” with the environment.
• In a forest you might build a blind of tree branches. In a city you might sit on a bench with a newspaper with holes cut out so you can watch people
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Ethologists (ethology)
• a European branch of biology/psychology devoted to the study of the behavior of organisms in relation to their natural environment
• the “quest for the roots of intelligence”
• comparative study of species looking for the evolutionary path (phylogeny) of behavior
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Example: Ethology Study
• Example: Crossing behavior of people in mixed-gender groups. Done in a city environment
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From the field to the lab
• Observational study is often a first step in studying a new topic before you begin lab research
• Example: Tinbergen, herring gull chicks feeding behavior
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Famous observational researchers
• Jane Goodall: Chimpanzees
• Dian Fossey: Mountain Gorillas (Gorillas in
the Mist)
• Were they truly using a method of naturalistic observation?
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Methods with Intervention
• Participant observation- the researcher both observes and participates in the action
• Two types: Undisguised and Disguised
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Undisguised
• the subject of the observation is aware that they are being observed
• Often a method used by anthropologists• Ed Tronick, Gilda Morelli both from UMASS• Studied child rearing practices in rural African
villages• Lived in the village while collecting data for
months at a time• Reactive behavior can be a problem
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Disguised Participant Observation
• researcher both observes & participates but is disguised so that the subject is not aware of the observation
• This eliminates the problem of reactive behavior…provided the disguise works
• Rosenhan (1973) On Being Sane in Insane Places
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Example #1: Rosenhan (1973) On Being Sane in Insane Places
• 3 women, 5 men, false names, tried for admission to different psychiatric hospitals
• Symptom: voice saying “empty, hollow, thud” same sex, unfamiliar
• All were admitted as suffering from schizophrenia
• Once admitted, acted as normally as possible• Never recognized as “normal”, released
between 7-52 days
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Example #2: Festinger, Reiken, and Schacter (1956)
• Even though you eliminate reactive behavior, by participating in the action, you may change the behavior you observe
• Infiltrated a group in Texas who claimed to be in communication with beings from outer space
• Predicted a disastrous flood on a particular date
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• Welcomed to group and one in particular was seen as a space being binging a message
• Festinger et al felt they had changed the behavior they observed by their stories (inadvertently reinforced the group’s beliefs) and felt their observations were invalid as a result
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Structured Observation
• observe behavior in a structured environment but do not interfere and observe unobtrusively
• Often used when studying family relationships in family therapy situations
• One-way mirror, “living room” environment (structured), Mom, Dad, children
• Observe thru mirror, watch interactions
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Second Example: Calhoun (1962) Population Density and Social Pathology
• Set up a living space for rats (Structured environment)
• Adequate food, H2O, and nesting materials
• Four separate rooms with ramps
• Two rooms have only one ramp, two have two ramps
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• Put a set of rats in and then observed without intervening (except to supply food/water/nesting materials)
• Rats quickly over-populated (to about 80 rats)
• many pathological behaviors developed, especially in the rooms with two entrances (Behavioral Sink)
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Field studies
• a cross-over to quasi-experiments
• there is a true IV, at least two levels
• uses method of observation
• done in a non-lab, natural environment
• often social psychology studies
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Zimbardo (1973) on vandalism
• Vandalism is hard to study in a lab environment
• Looked at the effects of anonymity on vandalism
• darkness & crowded environments would increase feelings of anonymity & foster more vandalism
• Hypothesized that vandals would be more likely to be young people, not adults
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• Used concealed observers
• Took two used cars in good condition, abandoned, no license plates, hood up
• Left one car one block from NYU (very urban)
• Left one car one block from Stanford University (rural/suburban)
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New York City Vehicle (NYU)
• first vandals within 10 minutes in broad daylight
• adult man and woman, one child, stripped car
• As many adult vandals as youths
• As much vandalism during day as at night
• 23 vandals in 3 days, nothing left after a week
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California Vehicle (Stanford)
• never touched at all after one week
• some neighbors reported the car to police
• one person lowered hood when it started to rain
• Moral: don’t park your car 1 block from NYU. Park at Stanford and take a plane
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Recording behavior in Observational Research
Narrative Record• record ALL behavior
• Use video tape, audio tape, or written records
• used by ethologists, ethograms, long lists of all behaviors for a species
• More often you record “units” of behavior, specific types of behavior of interest
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Recording units of behavior
• Frequency of behavior (how often it occurs)
• Duration of behavior (total amount of time behavior occurs)
• Rate (frequency per time unit, number of times per minute, for example)
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• Most often several observers gathering data for any one piece of research
• In order to combine the information from multiple observers, you must establish “inter-observer reliability”
• Inter-observer reliability: the percentage of agreement amongst observers
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Inter-Observer Reliability*Must multiple by 100 to get
“percent agreement”*
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Example: Aggression in a pre-school environment
• Must first have an “operational definition” of “aggression”
• Observers discuss and agree on a definition• All observers observe the same classroom
(events) and record separately any acts of aggression
• Measure inter-observer reliability (Percent agreement)
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• Two observers stationed at a one-way mirror into a preschool classroom space
• Watch children for 50 minutes
• At the end of each 5 minute period, put a check mark if an act of aggression has occurred
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5-min sections O1 O2 Agree??
1 X
2
3 X X
4
5 X
6 X
7
8
9 X X
10
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5-min sections O1 O2 Agree?
1 X
2 Agree
3 X X Agree
4 Agree
5 X
6 X
7 Agree
8 Agree
9 X X Agree
10 Agree
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• Seven “agrees” out 10 observations
• 7/10 = .7• .7 (100) = 70% agreement
• Need 85% or above before you can combine data
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• Would discuss the “operational definition” of aggression and try again for inter-observer reliability until the observer’s reach at least 85% agreement
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Advantages of Observational Research
• Increased external validity
• Allows you to see behavior as complex, the result of many antecedents
• Some behaviors can only be observed in a natural setting (such as vandalism)
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Disadvantages of Observational Research
• Because you are in the “real world” you lose control over many variables
• noise, weather, lighting etc
• for example, in the Zimbardo study, was the weather the same in NY as in California? This could have caused a “threat to internal validity”