Psychological Research - Exam 1 Flashcards
operational definition
what we expect
provides specific description of a variable
scientific method (definition)
HOW you study something and evaluate claims
steps of the scientific method
- observe phenomenon
- create hypothesis/prediction
- test hypothesis
- draw conclusions
- evaluate conclusions
what is a hypothesis?
testable prediction that comes from theories (ex: getting rejected by others will make people more aggressive)
what is a confederate?
people in on a study pretending to be participants
what questions should we ask when drawing conclusions?
is the hypothesis supported?
how do findings relate to prior theory?
can we prove something from drawing conclusions?
NO
what does evaluating conclusions also include?
presenting research or publishing in a journal for others to evaluate your methods/conclusions
descriptive research
attempts to describe certain phenomenon
**cannot determine cause/effect
3 types:
- naturalistic observation
- case studies
- surveys and interviews
naturalistic observation
observe people in natural setting
ex: watching children play on a playground
what is important for naturalistic observation?
taking good notes
having multiple observers
using a natural environment
why is it important to use a natural setting for a naturalistic observation?
people behave differently when not in a natural setting
case study
in depth look at a single individual
performed when aspects of an individual’s life cannot be replicated (ethical reasons)
ex: studying someone who lost half of their brain
what can be an issue with case studies?
issues with generalizability
cannot ethically replicate studies
surveys and interviews
standard set of questions/items everyone is asked
designed to assess someone’s self reported attitudes or beliefs
limitations of surveys and interviews?
wording effects - different words mean different things to people/perception (ex: Obamacare vs Affordable Care Act)
people often respond in a socially acceptable/desirable way
correlation research
tells us the relationship between variables
is either positive, negative, or zero
positive correlation
going the same direction
ex: more studying -> higher grades
negative correlation
going in opposite directions
ex: more time at bar -> lower grades
zero correlation
no relationship/pattern
ex: more studying -> more often car breaks down
correlation coefficient
r
-1.00 - 1.00 **cannot go out of this range
closer to 1.00 = stronger correlation
what is important to remember about correlation?
correlation is NOT causation
ex: there is a strong correlation between ice cream sales and murder
third variable problem
a third variable that may explain the relationship between 2 variables
experimental research
manipulation of one/more independent variable that are believed to influence a dependent variable
**goal - determine cause and effect