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142 Cards in this Set

  • Front
  • Back
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Intuition
personal judgement or a single story about one's personal experience
-tells us about the world
finding an explanation for our own behaviors or the behaviors of others
ex. conclusion that when you adopt a child, you conceive one shortly after
intuition
problem: we may draw conclusions about cause and effect-illusory corrleation
authority
we are more likely to believe a speaker sho is prestigious, trustworthy, and respectable
ex. aristotle
use of objective observations to answer question about the nature of a behavior
empiricism
-knowledge is based on observations
-data are collected
to conclude a causation:
-covariation of cause and affect
-temporal precedence
-elimination of plausible alternative explanations
covariation of cause and effect
cause is present, effect occurs
when cause is NOT present, effect DOES NOT occur
temporal precedence
a temporal order of events in which the cause COMES BEFORE the effect
1. cause=tv viewing
2. effect=aggression
elimination of alternative explanations
-nothing other than a causal variable could be responsible for this observed effect
ex. children who watch a lot of TV are left alone more than those who don't.
Basic research
-tries to answer fundamental questions about the nature of a behavior
-theoritical issues concerning phenomena
ex. russian memories are recalled more often when speaking russian. english memories in english
what are the personality charactieristics for this job?
Basic research
applied research
conducted to address the issues in which there are practical problems and potential solutions
violence and sex impair memory for TV ads.
measure personality and use to determine best personalities for the job and hire accordingly
applied research
skeptical attitude
ideas must be evaluated on the basis of careful logic and results from scientific investigation.
type of idea or questions
-makes a statement about something that may be true
hypothesis
when is a hypothesis not testable?
when the hypothesis is circular
concepts are poorly defined
-involves non scientific ideas or forces
MUST be observable
not "the devil made me do it"
a systematic body of ideas about a particular topic or phenomenon
theories
what do theories do?
ORGANIZE and EXPLAIN a variety of specific facts or descriptions of behaviors
-these facts are NOT meaningful by themselves
what else do theories do?
generate new knowledge by focusing our thinking so that we notice new aspects of behavior
NOT the same as hypothesis
-grounded on actual data from prior research
MUST be falsifiable
Parts of a scientific manuscript
Abstract
intro
method
results
discussion
ethical research (milgram's obedience study)
participants met another "participant"-Mr. Wallace who was hooked up to electric shocks
-shocked him
showed the human inability to resist authority
belmont report
set of guidelines for the TREATMENT OF PARTICIPANTS
beneficence (from belmont report)
Maximum results,
minimum risks
benefits from beneficence
education
treatment for condition
satisfaction with contributing to research
money
risks from beneficence
physical harm
psychological stress
debriefing
loss of privacy and confidentiality
-naturalistic observation and privacy issues
autonomy (belmont report)
decision whether or not to participate
-INFORMED CONSENT FORM-can quit at any time..etc.
justice (from belmont report)
selection of participants
make sure to choose a variety of participants
equally exposed to drugs
IRB
Needs to have IRB
-at least 5 people, 1 from outside institution
-NOT peer review process
-submit application to IRB for review and approval
debriefing (from belmont report)
researcher reveals full nature of experiment
makes sure not distress was experienced
operational definition of a variable
in terms of the operations of techniques that a researcher uses to MEASURE/MANIPULATE
ex: anxiety:
self report questionnaire
number of foot taps
amount of sweat
nonexperimental method
observe or measure variables of interest
behavior is observed as it NATURALLY HAPPENS
CORRELATIONAL method
cannot determine direction of cause and effect
experimental method
directly manipulating and CONTROLLING variable
MANIPULATE 1 variable and measure another
researcher manipulates the IV and controls all other variables either by RANDOMIZATION or by DIRECT EXPERIMENTAL CONTROL
Variable that is MANIPULATED to observe its effect on the dependent variable
IV
Variable that is the subject's response to, and dependent on the level of the independent variable
DV
a relationship in which INCREASES in the values of the first variable are accompanied by both increases and decreases in the values of the 2nd variable
curvilinear relationship
diagional lines-show relationship between variables-like correlation (pos and neg)
linear relationship
flat line
no relationship
degree to which a measurement device accurately measures the theoretical construct it is designed to measure
construct validity
certainty with which results of an experiment can be attributed to the manipulation of the IV rather than to some other confounding variable
internal validity
different measures of the SAME CONSTRUCT give the SAME RESULT
convergent validity
if life satisfaction and pos. affect are not related-not correlated
measure of the 2 constructs that are not related so they allow us to discriminate between the 2 constructs
discriminant validity
subjects behavior changes because of the awareness of the observer
reactivity-like cameraman following around
to minimize this, allow subject to get used to observer
-conceal observer
true score
real score on the variable
measurement error
an unreliable measure of intelligence contains considerable measurement error and does not provide an accurate indiciation of an individuals true intelligence
-little measurement error=reliable
-yield identical (or close) intelligence score EACH TIME
pearson product moment correlation coefficient
r=-1 to 1
the closer r is to 1 or -1=stronger
measuring same individuals at 2 points in time
test-retest reliability
measures what it is supposed to measure
face validity
reliability coefficient determined by the correlation between scores on half of the items on a measure with scores on the other half
split-half reliability
an indicator of reliability that examines the agreement of observations made by 2 or more raters
interrater reliability
measurement scale with categoreis with NO numeric scales
ex. males/females
introverts/extroverts
nominal
measurement scale with rank ordering/numeric values limited
ex. 2, 3, 5 star restaurants
-intervals between variables NOT known
ordinal
measurement scale with numeric properities that are literal
-assume equal interval between values
ex. inteligence/aptitude test score/temp
no true 0
interval
measurement scale where zero indicates absence of variable measured
does have absolute 0
ex. reaction time/weight/age
ratio measurement scale
can form ratios (someone weighs 2x as much as another person)
does not test hypothesis framed before study
-qualitative in nature but can be quantative also
naturalistic obeservation
observation that is only interested in a few specific behaviors-
-much less global than naturalistic
-in defined settings
systematic observation
reactivity is a problem here
uses previous information to answer questions
archival research
statistical records
survey archives
written records (content analysis)
statistical records
public records
ex. baseball records
survey archives
consisting of data from surveys that are stored in computers and available
-cheap/free and are about NATURAL samples
written records
diaries and letters
content analysis
systematic analysis of these existing documents (of statistical records, survey archives)
answering in a socially desirable way
"faking good"
response set
a pattern of individual response to questions on a self report measure that is not related to the content of the questions
larger sample size = raises or lowers the size of CI?
LARGER sample size REDUCES the size of CI
confidence interval
an interval of values within which there is a given level of confidence (ex 95%) where the population lies
probability sampling
each member of the population has an specific probability of being chosen
used when it is important to accurately describe the population
non probability sampling
we don't know the probability of any particular member of the population being chosen
this affects ability to generalize
ex. asking psych students to knock on doors in dorm buildings
ex. a computer program randomly chooses 100 students from a list of all 10000 college students
simple random sampling (prob)
ex. the names of all 10000 college students are sorted by major and a computer randomly chooses 50 students from each major
stratified random sampling (prob)
ex. 200 clusters of psych majors are identified at schools all over the US. out of these 200 clusters, 10 clusters are chosen randomly and every psych major in each cluster is sampled
cluster sampling (prob)
ex. ask students around you at lunch or in class to participate
haphazard (convenience) sampling (nonprob)
ex. in an otherwise haphazard sample, select indiviuals who meet a criterion (age of a group)
purposive sampling (nonprob)
ex. collect specific proportions of data representative of percentages of groups within population, then use haphazard techniques
quota sampling (nonprob)
sampling frame
the actual population of individuals (or clusters) from which a random sample will be drawn.
rarely will this coincide with population of interest-some biases will be introduced
response rate
the percentage of people in the sample who actually competed the survey. 100 out of 200 people mail back, response rate=50%
when researchers are able to manipulate a variable by presenting written, verbal, or visual material to the participants
straightforward manipulation
when a confederate is used
or stimulating a situation like in the real world
staged manipulation
ceiling effect
failure of a measure to detect a difference because it was too EASY
floor effect
failure of a measure to detect a difference because it was too DIFFICULT
demand characteristics
cues that inform the subject how they are supposed to behave
any feature of the experiment that informs the participants the purpose of the study
experimenter bias (expectancy effects)
any influence (intentional/unintentional) that the experimenter exerts on subjects to confirm the hypothesis under investigation
manipulation check
a measure used to determine whether the manipulation of the IV has had its INTENDED EFFECT on a subject
confounding variable
a variable that is not controlled in a research investigation
internal validity
certainty with which results of an experiment can be attributed to the manipulation of the IV rather than some other confounding variable
what type of design (a true experimental design) where the DV is measured only ONCE, after the manipulation of the IV
posttest-only design
what type of design is an experiment in which DIFFERENT SUBJECTS are assigned to EACH GROUP?
independent groups design
also called between-subjects design
what type of design is an experiment where the same subjects are assigned to each group?
repeated measures design
also called within-subjects design
what is an order effect?
the order of presenting the treatments affects the DV.
ex. greater recall in a certain condition could be because of the order of the conditions
repeated measures
what is a practice effect? (order effect)
an improvement in performance as a result of repeated practice with a task
repeated measures
what is a fatigue effect? (order effect)
when performance gets worse because the participant gets tired/bored/distracted
repeated measures
what is a contrast effect? (order effect)
when the response of the 2nd condition in the experiment is altered because the 2 conditions are contrasted to one another
repeated measures
how would you solve order effects?
counterbalancing
what is counterbalancing?
using all possible orders of presenting the conditions in the experiment
what is a matched pairs design?
RANDOMLY assigning participants to groups.
goal is to first match people on a participant CHARACTERISTIC.
matching variable will either be DV or something closely related to DV
cross-sectional method
randomly selecting participants from different AGE GROUPS.
different participants make up different age groups
adv: fast
disadv: generation (cohort) effects
longitudinal method
single group of participants is followed over time and tested repeatedly
disadv: may not apply to other generations
mortality (attrition)
improved performance
reactivity
adv: allow you to see the development of behaviors.
Using more than 2 levels of an IV
the results of an experiment with only 2 GROUPS (2 levels of an IV) will always appear to be LINEAR
using MORE than 2 levels of the IV reveals a CURVELINEAR or nomonotonic relationship
complex design
2 OR MORE IVs are manipulated SIMULTANEOUSLY in a single experiment
complex design=factorial design
can determine each IV alone (main effects) and the effect of the IVs in the combination (interaction effects)
1 2
3 4
what is an interaction?
when the effects of 1 variable depend on the level of another variable
you can't discuss the effect of 1 IV without considering the effect of the other IV
parallel lines generally indicate LACK of interaction
what is the main effect?
the DIRECT EFFECT of an IV on a DV
what is a quasi experimental design?
NOT a true experiment
approximates the control features of true experiments to infer that a given treatment DID have its intended effect
addresses the need to study the effect of an independent variable in settings in which the control features of true experimental designs cannot be achieved.
internal validity
are the conclusions telling us the truth?
problems with one group pretest-posttest design
HISTORY
can be caused by any confounding event that OCCURS AT THE SAME TIME as the experimental manipulation
threat to internal validity
problems with one group pretest-posttest design
MATURATION
any changes that occur systematically over time.
ex. problem in smoking reduction if more people become concerned about their heatlh
threat to internal validity
problems with one group pretest-posttest design
TESTING
taking any pretest changes the participants behavior.
threat to internal validity
problems with one group pretest-posttest design
INSTRUMENT DECAY
people may get tired of recording the number of cigarettes smoked per day-leads to an apparent reduction in cigarette smoking when is not really true.
threat to internal validity
problems with one group pretest-posttest design
REGRESSION TOWARD THE MEAN
when participants are selected because they score extremely high or low on some variable and when tested their scores are more likely to go in the direction of the mean.
threat to internal validity
problems with nonequivalent control group design
SEECTION
when participants who form the 2 groups in the experiment are chosen from existing natural groups.
threat to internal validity
interrupted time series design
the effectiveness of the treatment is determined by measuring both before and after treatment
the treatment is NOT introduced at random points in time.
control series design
interrupted time series design with a CONTROL GROUP
what is a quasi experimental design?
NOT a true experiment
approximates the control features of true experiments to infer that a given treatment DID have its intended effect
addresses the need to study the effect of an independent variable in settings in which the control features of true experimental designs cannot be achieved.
internal validity
are the conclusions telling us the truth?
problems with one group pretest-posttest design
HISTORY
can be caused by any confounding event that OCCURS AT THE SAME TIME as the experimental manipulation
threat to internal validity
problems with one group pretest-posttest design
MATURATION
any changes that occur systematically over time.
ex. problem in smoking reduction if more people become concerned about their heatlh
threat to internal validity
problems with one group pretest-posttest design
TESTING
taking any pretest changes the participants behavior.
threat to internal validity
problems with one group pretest-posttest design
INSTRUMENT DECAY
people may get tired of recording the number of cigarettes smoked per day-leads to an apparent reduction in cigarette smoking when is not really true.
threat to internal validity
problems with one group pretest-posttest design
REGRESSION TOWARD THE MEAN
when participants are selected because they score extremely high or low on some variable and when tested their scores are more likely to go in the direction of the mean.
threat to internal validity
problems with nonequivalent control group design
SEECTION
when participants who form the 2 groups in the experiment are chosen from existing natural groups.
threat to internal validity
interrupted time series design
the effectiveness of the treatment is determined by measuring both before and after treatment
the treatment is NOT introduced at random points in time.
control series design
interrupted time series design with a CONTROL GROUP
single-subject experimental design
NOT case studies
traditionally used in studies of reinforcement and behavior modification
reversal design: ABA/ABAB
A=baseline
B=treatment
multiple baseline design
measure baseline in several situations (ex. aggressive behavior at home/school/daycare)
introduce treatment at different times in different situations
a measure of variability of scores about a mean.
the mean of a sum of squared deviations of scores from the group means
variance
S^2
the average deviation of scores from the mean (square root of variance)
standard deviation
S
regression equation
a mathematical equation that allows prediction of one behavior when the score of another variable is known
y=a+bx
null hypothesis
assuming that there is no difference between the populations from which the samples were drawn
reject null if p<.05
ex. the drug will have no effect
alternative/research hypothesis
there is a difference between the populations
ex. the drug had an effect
t-test
tests the significance of the DIFFERENCE BETWEEN MEANS
independent groups
repeated measures
one-tailed test
group 1> or < than group 2
you hypothesize that group 1 LESS THAN OR GREATER THAN group 2
two-tailed test
you DO NOT SPECIFY a predicted direction of difference
say group 1 WILL DIFFER from group 2
ANOVA (f-test)
used to determine whether 2 or more means are significantly different.
F=ratio of systematic variance to error variance
two-tailed
h0: mean ofexperimental pop=control pop
hA: mean of experimental pop NOT=to control pop
one-tailed
h0: mean of experimental pop is less than OR EQUAL to control pop
hA: mean of experimental pop is greater than control pop
if p<.05
conclude that sample means are significantly different
IV had an effect
if p>.05
conclude that the sample means are not significantly different
IV did not have an effect
type 1 error
when the null hypothesis is TRUE but you REJECT it.
IV had no effect but you conclude IV had an effect
False alarm
ALPHA
type 2 error
IV had an effect but you conclude that it did not
null is FALSE but you DO NOT REJECT it
Miss
BETA
prob of correctly deciding null is false
1-B
POWER
a limitation on generalization is an...?
interaction
ex. 2 different subject groups of the population would BEHAVE DIFFERENTLY
best evidence for external validity is ?
REPLICATION with different populations/situations/times
exact replication
allows you to relate your results to previous results
to confirm a surprising or unexpected result
extraordinary claims require extraordinary proof
conceptual replication
replication of the conceptual relationship between variables using DIFFERENT PROCEDURES and DIFFERENT PARTICIPANTS
measuring DV in operationally different ways.
meta-analysis
a set of statistical procedures for COMBINING THE RESULTS OF A NUMBER OF STUDIES in order to provide a GENERAL ASSESSMENT of the relationship between variables