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Techniques of Empirical Research
Definitions
68
Political Studies
Undergraduate 1
12/17/2011

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Term
hypothesis
Definition
a conjectural statement, thought to be true but which can never be (dis)proven, of the relationship between two variables and logically implied by a proposition.
Term
theory
Definition
a set of interrelated propositions or empirical generalizations that link two concepts together to help explain phenomena, organize knowledge and derive hypotheses.
Term
5 conditions of a theory
Definition
1. simplicity/parsimony
2. internal consistency
3. testability/falsifiability
4. predictive accuracy
5. generality
Term
inductive logic
Definition
observations -> empirical generalizations -> theory
challenge existing knowledge but can lead to false conclusions through assumptions of time order and causality
Term
deductive logic
Definition
axiom/assumption -> proposition -> hypothesis
if axioms are accurate, allow from strong causal inferences and are rarely false conclusions, but axioms can be restrictive
Term
scientific method
Definition
acquisition of knowledge through the application of the scientific principles of empiricism, intersubjectivity, explanation and determinism (EDIE) - always falsifiable
Term
hallmarks of the scientific method
Definition
EDIE - empiricism, determinism, intersubjectivity and explanation
Term
empiricism
Definition
knowledge claim be based on systemic observation - assuming most accurate/reliable information. attaining information through senses helps guard against bias
Term
intersubjectivity
Definition
replicability: clear enough that someone can redo and get same results
transmissible: people see how we arrive at our conclusion. Guard against bias **not objectivity**
Term
explanation (scientific method)
Definition
goal of scientific method - political phenomena are explained by how they relate to something else. looks at explaining recurring patterns.
Term
determinism
Definition
implies that there are recurring regularities in political behaviour. assumption that cannot be (dis)proven and is valid insofar as research withstands empirical testing
Term
compare logic to scientific method
Definition
make observations -> make criteria in advance through observation
make a conclusion -> tests for plausible alternatives
ignore confounding evidence -> revises explanations
Term
concept
Definition
refers to anything that is directly or indirectly observable and is given meaning by people. provide the basis for classification, comparison and quantification
Term
classification (concept)
Definition
sort phenomena into categories that are exhaustive, mutually exclusive and preferably have a comparative concept
Term
comparison (concept)
Definition
allows you to order phenomena - more or less of a property
Term
quantification (concept)
Definition
the ability to measure how much property is present
Term
variable
Definition
provide the empirical grounds for testing a concept - operationalization. How we move from theoretical to empirical realms.
Term
indicator
Definition
the operationalization of a variable.
Term
causality
Definition
comparison, manipulation, control: covariation, time order, spuriousness
** correlation is not causation**
Term
Internal threats to validity
Definition
extrinsic: selection bias (not generalizable, sacrificed for intrinsic)
instrinsic: History, Regression, Reactivity, Instrumentation, Mortality, and Maturation
Term
external threats to validity
Definition
extrinsic: unrepresentative cases, reactivity and artificiality of the research setting.
Term
formula of effect
Definition
TG(PoT - PreT)- CG(PoT - PreT)
Term
reliability
Definition
does the measurement instrument perform consistently? MANDATORY FOR VALIDITY
Term
validity
Definition
are we measuring what we think we are measuring?
Term
measurement error
Definition
values given to observations are attributed to flaws in the measurement process
Term
systemic measurement error
Definition
a form of bias, can be controlled for later. jeopardized validity.
Term
random measurement error
Definition
occurs something transient, jeopardized validity and reliability. cancel out.
Term
content validity
Definition
focuses on content, how appropriate (face validity)are your indicators, and how completely (sampling validity) do they encompass the full meaning of the concept
Term
construct validity
Definition
set up auxiliary hypothesis with different variables and indicators representing the same concepts. You should get the same result.
Term
probability (random) sampling
Definition
every individual in the population has an equal chance of being included in the sample
Term
non-probability sampling
Definition
the researcher chooses who is included and there is no guarantee that every member has an equal chance (or even a chance) of being included
Term
simple random sampling
Definition
every member of a population has an equal chance of being included in the sample: avoids bias and is generalizable. need population list, can use resources and produce extreme samples
Term
multi-stage random cluster sampling
Definition
random selections of groupings of a population from which you randomly select members. reduce cost of sampling dispersed populations, obviates need for population list. Increases risk at every stage of selection. either increase population size or stratify within clusters.
Term
open-ended question
Definition
the wording of the response is not fixed
4/5
Term
closed ended questions
Definition
the wording of the response is fixed 7/5
Term
open-ended advantages/disadvantages
Definition
A: control, rapport, new ideas, no putting ideas into respondents heads, rich contextual understanding.
D: time consuming, interviewer bias, irrelevant answers, comparability, categorization might lose meaning, replicability.
Term
closed ended advantages/disadvantages
Definition
A: comparability, time, relevant, replicability, no interviewer bias, control, shy can speak.
D: put ideas into people's heads, answer without true opinion, not include all relevant categories, loss of rapport, limited contextual understanding.
Term
ethical principles of research
Definition
no deception, no harm, voluntary and informed consent. DHVI
Term
informed consent
Definition
competence, voluntarism, full information and comprehension. CIVC.
Term
direct observation
Definition
direct observation of political behaviour in its natural setting - data collecting and theory building
Term
direct observation A/D
Definition
A: flexible, feasible, cost, understanding, external validity, immediacy.
D: reactivity and privacy
Term
indirect observation
Definition
A: no reactivity
D: ethics
Term
covert participation
Definition
A: no reactivity
D: ethics, and people might react to someone not participating.
Term
comparative case studies
Definition
attempt to mimic the logic of statistical control when sufficient data is not available. method of agreement, and method of difference
Term
method of agreement
Definition
pick cases similar on the IV and DV, but different in potentially confounding variables (controls)
Term
method of difference
Definition
pick cases that have the potential causal factor and response (IV and DV), to cases that do not have the predicted causal factor or response, but are similar on potentially confounding variables.
Term
case studies: critique
Definition
lieberson:
1. deterministic logic, 2. assuming no measurement errors, 3. existence of 1 cause 4. absence of interaction effects, 5. don't always have these cases, 6. external validity jeapardized by small N, 7. too many variables - (deterministic measurement causes real interaction of valid variables)
Term
case studies: advantages
Definition
lijphart: 1. powerful to test theories, 2. problems of measurement reliability and validity are reduced, 3. might be only only way to validate causal hypotheses about macro-phenomena.
Term
case studies: combat critiques
Definition
increase N: geographic proximity, diachronically study one country, sub-national groups within a nation or combine similar variables or focus on only the key ones.
Term
content analysis
Definition
is a technique for making inferences by systematically and objectively identifying certain aspects of communications that are available and recorded. who, said what, to whom and to what effect?
Term
systematically (content analysis)
Definition
all content is included (or not) based on a set of consistently applied criteria
Term
objectively (content analysis)
Definition
or intersubjectivity is the identification of content according to specific rules - different people will get the same results.
Term
content analysis A/D
Definition
A: cheap, insightful, generalizable and no reactivity, look at history or inaccessible political figures, few ethical concerns.
D: criteria is subjective, so there can be problems with validity - are they representing the full concept? if you take a sample, there will be a relative degree of error.
Term
types of content analysis
Definition
latent (leaning), substantive (what was said), coding manifest (# of words) a structural (space, size, columns). (LSSC)
Term
statistically testing a hypothesis
Definition
statistical significance (chi-square), the co-variation (measure of association)
Term
covariation
Definition
variables vary in a consistent and patterned way
Term
measure of association
Definition
show how strongly our variable vary - how much we reduce our error when guessing the DV, if we know values on the IV. Oridnal - gamma or tau, nominal - lambda or cramers V
Term
proportional reduction in error
Definition
the amount we reduce error when guessing values on the DV by knowing values on the IV
errors without knowing IV - errors with knowing IV/ error without knowing IV
Term
Lamba
Definition
measure of association for nominal level statistics - using modal category, guess number of mistakes you would make, then subtract number of mistakes you would make knowing IV. It will be 0 if modal categories are the same for IV - Cramers V
Term
measure of central tendency
Definition
helps to determine the most common/typical value of your data. how typical is the value? do the variables vary? is there a lot of dispersion?
Term
measure of dispersion
Definition
the amount to which variables vary in a data set - the extent to which variables are concentrated in a few categories or dispersed (tells accuracy of central tendency)
Term
central tendency for levels of measurement
Definition
nominal - mode (variational ratio equation V = 1 - fmodal/N
ordinal - median (range or interquartile range, middle 50th percetile)
ratio/interval - mean (sensitive to outliers, so compare to median which looks at relative position - less affected by outliers)
Term
sample size
Definition
N = ZCI2S2/E2
must be random, more than 30+, S = level of variation in population **size of pop doesn't matter unless more than 5% of total population**
Term
confidence interval equation
Definition
% = (sample mean) +/- (ZCI)(standard deviation of sample which is caluclated by √s/n)
Term
confidence interval
Definition
a range of values within which we have a predetermined level of confidence that the true population value lies within. Sacrifice accuracy for confidence.
Term
type I error
Definition
observed relationship within a sample is not generalizable onto the population (use inferential stat to find this out)
Term
type II error
Definition
there is a relationship in the population that was not in our sample.
Term
logic of chi-square
Definition
1. create null hypothesis
2. calculate expected frequencies
3. compare expected to observed
4. partial adjustment for sample size (larger sample, less risk of type 1 error)
5. calculate degrees of freedom - more cells more opportunity to deviate from expected frequencies (#columns -1)(#rows-1)
6. consult chi-square distribution chart
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