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DescriptiveResearch
Observation:
Can you see the behavior?
Is it a sensitive topic?
Do you have a lot of time?
Do you know what you are looking for?
Natural Observation
No intervention- behavior as it normally occurs
useful for external validity or if ethical concerns about manipulation
e.g book carrying exampleType 1 - 1 or both arms around books short edges on hipType 11- one arm at side long edges horizontal to the ground
82% type 1 female 3% male96% type 11 male 16% female
Observation with intervention
- may cause an event that is rare or normally hard to see- investigate the change in response with stimulus- establish link between antecedent and consequent behaviors- manipulate independent variable.
EgSimon and Levin - change blindnessCrusco & Wetzel - waitress touch and tip
Participant Observation
- disguised or undisguised- takes part in the behavior and reports on it(journalist and anthropology)
eg Rosenhan - sane in insane placesFestinger - cognitive dissonance
Problems
-observer can lose objectivity because they are part of the event
-subject reactivity if known observation (eg stop sign observation)
- subject demand characteristics
- participating may change the event and the outcomes for others
- natural hazards for field work
Bias always a possibility
- observe what you want & fulfill expectationseg stop observing when nothing happens so over-report activity
- may change criteria with time
- boredom or fatigue impact
- delay in transcribing may not be exact record
Solutions
Unobtrusive or disguised observation - or trace information
Habituation to group helps reactivity
‘Blind’ scoring helps bias
Short sessions helps fatigue
Structured Observation
Situation is set up and then participants enter more controlled environment-often clinical or developmental lab setting one way mirror videos. Eg Piaget
Field Experiments
Manipulate IV in natural settingeg leopard and chimp
Record what??
Goal is to describe behavior as fully and accurately as possible
Need to use samples of behavior - cannot record everything.
Typically use 1) checklist of predetermined behaviors (eg Bobo)2) qualitative narrative3) quantitative event counts ratings.
Time Sampling
Choose time intervals to record behavior - systematic, random or both
eg observe children in 2 hours in morning class may not generalize to whole day so 4 sessions of 30 minutes spread across day better
or 30 minutes randomly chosen
Event Sampling
If event infrequent or long then time sampling not good -could miss all or part of behavior
So record how often predetermined behavior occurs
eg response to unpredictable eventscannot know when they will occur so timing will miss
eg newcomer to class
Situation Sampling
To improve external validity observe in different locations, conditions etc
eg animals in captivity or wildchildren at home or school
Subject Sampling
If there are many subjects may need to select some for observation
Observer Reliability
use more than one observer and check inter-observer reliability - correlation
Improves with clear definitions and training
% time agreement == 100 * number of agreement/ number of opportunities
Quantitative Measures
Typically nominal scale (categories counted)eg book carrying example
Rating common
Interval and ratio less common personal space duration
Survey research
Mail survey- quick efficient convenient- no response bias a problem (60% + response acceptable 30% typical)- participants answer in any order
Written questionnaires generally need to be self-explanatory and short
Written Questionnaire
- simple questions best- be specific- no double questions (eg have you experienced headache and nausea in last week?)- no double negatives ( if you have not had no headaches in last week….)- no ambiguous questions- no leading questions- short- readable- order can matter general to specific is usually best
Often rank scaleLikert scale 1-7
Specific categories best Do you get headaches frequently rarely etc…
better choice headaches 0-1 2-3 3-4 times a week
people may define terms like rare or often differently
Interviews
More open ended complex questions and follow up questions possibleOrder of questions controlled
phone - relatively easy but no-response bias and selection problems (unlisted numbers etc)
in person- very time consuming and expensiveProblems recording bias and leading questions
Designs
Cross sectional designone or more samples drawn at same time
Independent samples successive same survey different timeseg presidential approval rating
Longitudinalsame respondents surveyed over timehuge effort to track people