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Scientific Method
A systematic organized series of steps that ensures maximum objectivity and consistency in researching a problem
Theory
Ways of naming, ways of conceptually ordering our senses of the world. Statements that tend to explain some aspect of social life
Casual Explanation
Direction of Influence: x>y or y>x (a cause and effect)
Parts of a Theory
Concepts, Variables, Assumptions
Observations
Taking the abstract to real life experiences.
Empirical Generalizations
Analysis of data leads to generalized statements about findings.
Direction of Theorizing
Deduction: Theory Testing
Induction: Theory Construction
Epistemology
Theory of Knowledge, how do we know what we know?
Methodology
Scientific ways of collecting information to produce knowledge
Paradigm
Ontology + Epistemology + Methodology = Worldview
Positivism
Scientific Knowledge about the real world comes from empirical observation
*Objectivity - separated from bias
Interpretivism
Our knowledge of reality, including the domain of human action, is a social constructed interpretation by human actors
*Subjectivity
Research Wheel
Theory > Hypotheses > Observations > Empirical Generalizations
Concepts
Abstract ideas expressed in words (gender, race, deviance)
Variables
Concepts that take on a range of values, quantities, or categories (years of schooling)
Key element of theory building (starting point)
Assumptions
Unobservable and untestable statements about the nature of things
Levels of Analysis
Macro-Level: Society
Meso-Level: Social Institutions
Micro-Level: Individuals and Interpersonal Relationships
Multi-Level: combination of all
Hypothesis
A tentative statement about the relation between 2 or more variables (Indv and Depv)
Independent and Dependent Variables
Independent: Causal variable
Dependent: Effect/Outcome variable
Ontology
Branch of Philosophy concerned with the study of what exists
Units of Analysis
1. Individuals (social roles, positions, relationships
2. Social Groupings (families, organizations, cities)
3. Social Artifacts (books, documents, buildings)
Ecological Fallacy
Drawing erroneous conclusions about individuals based solely on the observation of groups
Individualistic Fallacy
Drawing conclusions about groups based solely on the observation of some individuals
Quantitative Research Design
* Testing causal relationships
*Pre-determined measures for data collection
*Analysis and Finding
Qualitative Research Design
* Case Study
* Context
* Interpreting the meaning of the cases
Difference between Quantitative and Qualitative Research
Quantitative: narrow a topic into a focused question before they finalize their study design. They use research question to create a hypothesis
Qualitative: Begin with a very general research question, and as they proceed their question gradually emerges
Explanatory Variables
Independent and Dependent Variable
Extraneous Variables
All variables (control variables)
Antecedent: variable that occurs prior to IV and DV
Intervening Variable
An effect of the IV and a cause of the DV
Spurious Variable
An antecedent that affects both the IV and DV
Spurious Variable
An antecedent that affects both the IV and DV
Non-Spurious: Only affects the IV
Conceptualization
Providing a specific and tentative definition for an abstract idea or a concept
Operationalization
Linking abstract concepts to specific measurements
Measurements - assigning numbers/labels to units of analysis in order to represent conceptual properties
Two Types of Operationalizations Measures
Direct - things we can observe rather simply and rather directly
Indirect - Things that require more subtle, complex, or indirect observations
Discrete Variables
Variables that have a relatively fixed set of separate attributes
Continuous Variables
Variables that have an infinite number of values that flow along a continuum
Leves of Measurement
Nominal, Ordinal, Interval/Ratio
Nominal
Variables whose attributes only have the characteristics of being jointly exhaustive and mutually exclusive
ex. gender, religion, provinces
Mutually Exclusive Attributes
The measurement requirement that each case can be placed in only one of a variables
Exhaustive Attributes
The measurement requirement that a measure includes all possible values or attributes of a variables, so every case can be classified
Ordinal
A variable with attributes or categories you can rank order along some dimension
ex. Social class, severeness of depression
Interval/Ratio
Interval: A variable with attributes rank ordered, and have equal distances between adjacent attributes, but have no true zero value (temperature)
Ratio: A variable whose attributes are rank ordered and have equal distances between adjacent attributes, but have a true zero value (income, years of schooling)
Indices
Condense the data generated by multiple indicators into a single number/score
Scales
An ordinal, interval, or ratio measure of a variables expressed as a numerical score
Reliability and Validity
Reliability: Consistency of the measure of a variable
Validity: Goodness of fit between a definition and concept intended to measure
Face Validity
Whether the measure appears to be valid on its face
(ex. photo ID)
Content Validity
The degree to which a measure covers the range of meanings included within a concept
Construct Validity
The degree to which a measure relates to variables within a system of theoretical relationships. What it's constructed to do
Construct Validity
The degree to which a measure relates to variables within a system of theoretical relationships
External Validity
What the results mean outside the particular context of the experiment. How the study can be generalized to other situations and to other people.
External Validity
What the results mean outside the particular context of the experiment
Threats to Internal Validity: Confounding Factors
Effects of the IV cannot be separates from possible effects of extraneous variables
Threats to Internal Validity: History Effects
Something occurs during the experiment, other than the treatment, that influences the outcomes
Threats to Internal Validity: Maturation
Changes within participants that affect the results of an experiment
ex. boredom, hunger
Threats to Internal Validity: Testing Effect
Testing and retesting with influence peoples behavior (growing sensitivity)
Threats to Internal Validity: Selection Bias
Systematic differences in the composition of the control and experimental groups
Threats to Internal Validity: Mortality/Attrition
A form of selection bias when participants drop out of the study. Sometimes due to death
Threats to Internal Validity: Instrumentation
Unwanted changes in measurement
Threats to Internal Validity: Diffusion of Treatment or Contamination
Research participants in different groups communicate with each other and learn about the other's treatment
Threats to Internal Validity: Experimenter Expectancy
Searchers who indirectly communicate desired findings to the subjects
Double-blind experiment
Solution to Experimenter Expectancy
The subjects nor the person who directly deals with the subjects knows the specifics of the experiment
Threats to Internal Validity: The Hawthorne Effect
Any variability in a dependent variable that is not the direct result of variations in the treatment variable
* The tendency in experiments for people to modify their behavior because they know they are being studied, and so to distort the findings
Survey Research
A method of investigation that uses question-based or statistical surveys to collect information about how people think and act
Survey Designs
To measure multiple variables by asking people questions and then to examine the relationships among the measures
Open-ended question
A question that can be answered in any way
Closed-ended question
Only specific ways to answer the question
Mail Surveys
Advantages:
Lower Cost, Covers Wide Area, Anonymity
Disadvantages:
Low response rate, no probing, language illiteracy, coverage issues (homeless)
Online Surveys
Advantages:
Lower cost, Wide Area, Anonymity
Disadvantages: Low response rate, no probing, language illiteracy, coverage issues (no internet)
Telephone Surveys
Advantages: Wide Area, Some probing, high response rate
Disadvantages: High Cost, Interviewer Bias, Low Anonymity
Face-to-Face Interview
Advantages: High response rate, extensive probing, obtaining rich data
Disadvantages: Costly, Time Consuming, Interviewer Bias
Avoidance's when writing survey questions
1. No Jargon
2. No Ambiguity
3. No Emotional based languages
4. Prestige bais
5. Double-barreled Questions
6. Sensitive
7. Beyond respondents capacities
8. Extreme Absolutes
9. Distant future intentions
10.Double Negatives
Prestige Bias
Questions that contain an expert of authority position which can affect how people respond
Double-Barreled Question
Asking more than one item in one question.
ex. asking about gender discrimination and prejudices against minorities
Sensitive Questions
Questions that contain sensitive items that can discourage participants to respond
ex do you ever hit your wife
Extreme Absolutes
Questions that contain extreme absolutes
ex. Do you ALWAYS observe traffic signs?
5 Rules for Obtaining Usable Answers
1. Mutually Exclusive and Exhaustive
2. Open-ended questions to a minimum
3. Must Be Specified
4. Consider a Don't Know Response
5. Provide a meaningful scale
Survey Design Issues: Question Order/Sequence
General to Specific
Avoid putting sensitive Q's at the beginning
Response-Reality Gap
The difference between what study participants respond in the survey/interview and what they actually behave or act in reality
Sampling
The process of selecting a subset of cases in order to draw conclusion about the entire set
Target Population
The population to which researchers would like to generalize their results
Sampling Frame
An operational definition of the population that provides the basis for drawing a sample
ex. Phone Book, Student Registry
Coverage Error
A mismatch between the target population and sampling frame
Undercoverage- Only using phonebook
Overcoverage - Duplication (overcount)
Sampling Error (Quant Only)
The deviation of the sample from the true characteristics, traits, behaviors, qualities or figures of the entire population
Parameters
Characteristics of a population
Parameters
Characteristics of a population; Numbers that summarize data for an entire population
The Sampling Distribution
Information from the sample is linked to the population via the sampling distribution
Random Sampling/Probability Sampling
Everyone in the target population has an equal chance of being selected for a study
Theoretical Sampling/Theoretical Saturation
Qualitative approach of sampling. The point at which no new themes emerge from the data and sampling is considered complete
Transferability
The study findings' fitting outside a particular study
The findings can have meaning to another group or could applied in another context
Systematic Sampling
every kth case
Simple Random
A simple random - through generating
Stratified Random Sampling
Population is divided into strata and independent random samples are drawn from each stratum
Multi-Stage Cluster Sampling
Population is broken into smaller areas, called cluster, and a random sample of clusters is drawn
Non-probability Sampling
Cases in population are not randomly selected and they do not have an equal chance of being selected
Convenience Sampling
A non-random sample in which the researcher selects anyone he or she happens to come across
Quota Sampling
Units are selected into the sample on the basis of pre-specified characteristics, so that the total sample with have the same distribution of characteristics assumed to exist in the population being studied
Purposive Sampling
Researcher uses a wide range of methods to locate all possible cases of a highly specific and difficult-to-reach-population
ex. drug dealers, prostitutes
Snowball Sampling
The initial study participants may be asked to suggest additional people for the study
Standardized Interview
*Positivist Approach (Bias Free)
*Strictly follows a script
*Closed ended questions
- Answers are usually: multiple choice, agree/disagree, likert scale
Theoretical Background of Standardized Interview
* Stimulus-Response Model
Same questions asked in same way to everyone (bias free)