Podcast
Questions and Answers
What is confirmability primarily concerned with in qualitative research?
What is confirmability primarily concerned with in qualitative research?
- The researchers' biases affecting results (correct)
- The emotional response of the participants
- The statistical significance of findings
- The accuracy of participant experiences (correct)
Which qualitative approach focuses on analyzing experiences from the first-person perspective?
Which qualitative approach focuses on analyzing experiences from the first-person perspective?
- Phenomenology (correct)
- Ethnography
- Content analysis
- Case study
What does participant observation involve?
What does participant observation involve?
- Joining the group being studied (correct)
- Interviewing participants about their experiences
- Conducting surveys on public opinion
- Analyzing data from existing literature
Which type of case study is completed before a larger exploratory study?
Which type of case study is completed before a larger exploratory study?
What is a key consideration when conducting a case study?
What is a key consideration when conducting a case study?
Ethnography primarily looks at which aspects within a research context?
Ethnography primarily looks at which aspects within a research context?
Which external factors can significantly influence individual experiences?
Which external factors can significantly influence individual experiences?
What does attrition refer to in a research study?
What does attrition refer to in a research study?
What is a key characteristic of parametric tests?
What is a key characteristic of parametric tests?
What does the assumption of linearity ensure in Pearson's correlation?
What does the assumption of linearity ensure in Pearson's correlation?
In the context of assumptions for statistical tests, what does homoscedasticity refer to?
In the context of assumptions for statistical tests, what does homoscedasticity refer to?
Which of the following correctly describes heteroscedasticity?
Which of the following correctly describes heteroscedasticity?
What is the assumption of normality crucial for in statistical analyses?
What is the assumption of normality crucial for in statistical analyses?
Which statistical method is an example of a non-parametric test?
Which statistical method is an example of a non-parametric test?
What type of designs are commonly seen in quasi-experimental designs?
What type of designs are commonly seen in quasi-experimental designs?
Why is the independence of errors important in regression analysis?
Why is the independence of errors important in regression analysis?
What is the main advantage of sampling without replacement?
What is the main advantage of sampling without replacement?
How does stratified random sampling help in research?
How does stratified random sampling help in research?
What is a major drawback of cluster sampling?
What is a major drawback of cluster sampling?
What can bias systematic sampling?
What can bias systematic sampling?
In sampling with replacement, what happens to the probability of selecting each individual?
In sampling with replacement, what happens to the probability of selecting each individual?
What characterizes systematic sampling?
What characterizes systematic sampling?
Which type of sampling reduces the risk of over- or under-representing specific groups?
Which type of sampling reduces the risk of over- or under-representing specific groups?
What can be a consequence of sampling error?
What can be a consequence of sampling error?
What is a challenge posed by cluster sampling?
What is a challenge posed by cluster sampling?
What is the effect of sampling without replacement in small populations?
What is the effect of sampling without replacement in small populations?
What is the primary purpose of manipulating independent variables in experimental studies?
What is the primary purpose of manipulating independent variables in experimental studies?
In a pre-post design research study, what is measured?
In a pre-post design research study, what is measured?
What distinguishes a control group in an experimental study?
What distinguishes a control group in an experimental study?
Which statistical tests are commonly used to measure group differences in experimental designs?
Which statistical tests are commonly used to measure group differences in experimental designs?
What is a characteristic of quasi-experimental designs?
What is a characteristic of quasi-experimental designs?
How does internal validity differ among research designs?
How does internal validity differ among research designs?
What is a feature of non-experimental designs?
What is a feature of non-experimental designs?
What is a limitation inherent in non-experimental designs?
What is a limitation inherent in non-experimental designs?
In what situation would a researcher use a longitudinal study?
In what situation would a researcher use a longitudinal study?
What is meant by population validity in the context of external validity?
What is meant by population validity in the context of external validity?
Which of the following describes a key feature of cross-sectional studies?
Which of the following describes a key feature of cross-sectional studies?
Which of the following can be considered a quasi-independent variable?
Which of the following can be considered a quasi-independent variable?
Which type of research design typically allows for the most generalizability?
Which type of research design typically allows for the most generalizability?
What does selective survival refer to in historical records?
What does selective survival refer to in historical records?
Which type of survey item allows respondents to provide answers in their own words?
Which type of survey item allows respondents to provide answers in their own words?
What is a characteristic of restricted items in surveys?
What is a characteristic of restricted items in surveys?
What defines a negative correlation between two variables?
What defines a negative correlation between two variables?
In correlational research, what does a correlation coefficient of 0.85 indicate?
In correlational research, what does a correlation coefficient of 0.85 indicate?
What does the coefficient of determination (R2) signify in regression analysis?
What does the coefficient of determination (R2) signify in regression analysis?
What is a common reason for participant fatigue in surveys?
What is a common reason for participant fatigue in surveys?
Which type of survey question allows for some restricted options while permitting open responses if needed?
Which type of survey question allows for some restricted options while permitting open responses if needed?
What is the primary focus of psychometrics?
What is the primary focus of psychometrics?
What does a regression line represent in statistical analysis?
What does a regression line represent in statistical analysis?
Which of the following correlations indicates a weak negative relationship?
Which of the following correlations indicates a weak negative relationship?
What indication does Pearson’s r provide in a bivariate correlation?
What indication does Pearson’s r provide in a bivariate correlation?
What result would an R2 value of 0.3 suggest about a regression analysis?
What result would an R2 value of 0.3 suggest about a regression analysis?
Which design allows for pre-treatment baseline measurement but lacks a control group?
Which design allows for pre-treatment baseline measurement but lacks a control group?
What is a limitation of longitudinal studies?
What is a limitation of longitudinal studies?
Which approach involves measuring a dependent variable at multiple time points but lacks a control group?
Which approach involves measuring a dependent variable at multiple time points but lacks a control group?
In developmental designs, which type involves grouping participants by their age?
In developmental designs, which type involves grouping participants by their age?
In non-equivalent group designs, what is a primary issue that affects research outcomes?
In non-equivalent group designs, what is a primary issue that affects research outcomes?
Which design allows participants to act as their own control?
Which design allows participants to act as their own control?
What feature distinguishes control time series from other time series designs?
What feature distinguishes control time series from other time series designs?
Which analysis technique is used to assess significant differences between the means of groups?
Which analysis technique is used to assess significant differences between the means of groups?
In cohort-sequential designs, what advantage is provided over traditional longitudinal studies?
In cohort-sequential designs, what advantage is provided over traditional longitudinal studies?
What type of design is characterized by alternating between treatment and baseline phases?
What type of design is characterized by alternating between treatment and baseline phases?
What does the effect size indicate in hypothesis testing?
What does the effect size indicate in hypothesis testing?
What limitation is common in interrupted time series designs?
What limitation is common in interrupted time series designs?
What is the definition of autocorrelation in time series analysis?
What is the definition of autocorrelation in time series analysis?
Which design is often affected by cohort effects when comparing age groups?
Which design is often affected by cohort effects when comparing age groups?
Flashcards
Simple Random Sampling
Simple Random Sampling
Participants are chosen so every person in the population has an equal chance of being selected.
Sampling with Replacement
Sampling with Replacement
Each participant selected is put back into the population before the next selection. This maintains equal selection chances each time.
Sampling without Replacement
Sampling without Replacement
Participants are not replaced after selection, altering the selection chance on the next pick. This is most common.
Stratified Random Sampling
Stratified Random Sampling
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Systematic Sampling
Systematic Sampling
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Cluster Sampling
Cluster Sampling
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Sampling error
Sampling error
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Sampling limitations
Sampling limitations
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Effect of population size
Effect of population size
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Replacement
Replacement
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Independent Variable (IV)
Independent Variable (IV)
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Dependent Variable (DV)
Dependent Variable (DV)
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Pre-Post Design
Pre-Post Design
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Randomization
Randomization
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Control Group
Control Group
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Quasi-Independent Variable
Quasi-Independent Variable
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Within-Groups Design
Within-Groups Design
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Between-Groups Design
Between-Groups Design
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Internal Validity
Internal Validity
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External Validity
External Validity
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Population validity
Population validity
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Ecological Validity
Ecological Validity
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Non-experimental Design
Non-experimental Design
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Correlation
Correlation
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Meta-analysis
Meta-analysis
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Confirmability
Confirmability
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Attrition
Attrition
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Phenomenology
Phenomenology
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Ethnography
Ethnography
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Participant Observation
Participant Observation
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Case Study
Case Study
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Illustrative Case Study
Illustrative Case Study
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Collective Case Study
Collective Case Study
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Linearity Assumption
Linearity Assumption
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Normality Assumption
Normality Assumption
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Homoscedasticity
Homoscedasticity
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Heteroscedasticity
Heteroscedasticity
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Independence of Errors
Independence of Errors
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Non-parametric Test
Non-parametric Test
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Spearman's Correlation
Spearman's Correlation
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Monotonic Relationship
Monotonic Relationship
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Selective Survival
Selective Survival
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Selective Depository
Selective Depository
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Psychometrics
Psychometrics
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Validation Study
Validation Study
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Open-ended Item
Open-ended Item
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Partially Open-ended Item
Partially Open-ended Item
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Restricted Item
Restricted Item
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Response Set
Response Set
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Reverse Coded Item
Reverse Coded Item
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Participant Fatigue
Participant Fatigue
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Theoretical Generalization
Theoretical Generalization
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Empirical Generalization
Empirical Generalization
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Correlation Coefficient
Correlation Coefficient
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Correlation Strength
Correlation Strength
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Regression
Regression
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Single Group Post-Test Only Design
Single Group Post-Test Only Design
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Single Group Pre-Post Design
Single Group Pre-Post Design
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Non-Equivalent Group Designs
Non-Equivalent Group Designs
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Non-Equivalent Post-Test Only Design
Non-Equivalent Post-Test Only Design
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Non-Equivalent Pre-Post Design
Non-Equivalent Pre-Post Design
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Basic Time Series Design
Basic Time Series Design
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Interrupted Time Series Design
Interrupted Time Series Design
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Control Time Series Design
Control Time Series Design
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Longitudinal Studies
Longitudinal Studies
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Cross-Sectional Study
Cross-Sectional Study
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Cohort Effects
Cohort Effects
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Cohort-Sequential Designs
Cohort-Sequential Designs
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Reversal Design
Reversal Design
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Multiple Baseline Design
Multiple Baseline Design
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Changing-Criterion Design
Changing-Criterion Design
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Study Notes
Reliability
- Reliability refers to the consistency, stability, or repeatability of a measure or observation.
- Three types of reliability exist: test-retest, internal consistency, and inter-rater.
Test-retest Reliability
- Measures the consistency of a measure over time.
- A good test-retest reliability results in similar scores when the same test is administered repeatedly under the same conditions.
- A poor test-retest reliability results in different scores when the same test is administered repeatedly under the same conditions.
- Reliability is assessed by calculating the correlation between scores.
- A strong correlation indicates good reliability, whereas a weak correlation indicates poor reliability.
Internal Consistency
- Measures the extent to which multiple items or measures of a variable are related to each other.
- Cronbach's alpha is a common measure of internal consistency.
- Values range from 0 to 1. A higher value suggests better internal consistency.
Inter-rater Reliability
- Used when measures are subjective and based on observer judgment, like evaluating behaviours.
- Assesses the agreement between multiple raters assessing the same behaviour.
- Cohen's kappa is a common measure of inter-rater reliability.
- Scores from 0 to 1, higher scores indicate stronger agreement between raters.
Validity
- Validity refers to whether a measure is actually measuring what it is supposed to be measuring.
- Four types of validity are frequently discussed: face, construct, criterion-related, and content.
Face Validity
- Refers to whether a measure appears to measure the variable it is designed to measure.
- Subjective and relatively weak form of validity.
Construct Validity
- Focuses on whether the measure accurately represents the underlying concept or variable.
- Does the operational definition of a concept measure the relevant concept.
- Examples include university entrance exams.
Criterion-Related Validity
- Measures how well a measure predicts or is related to a specific outcome or behavior.
- A language proficiency exam is a good example - scores accurately predict future success in a language course.
Content Validity
- The extent of how completely a measure represents the content domain it is designed to measure.
- A comprehensive measure has comprehensive content.
- Does the measure include all important components of the content domain and is nothing omitted, e.g., a test of General Knowledge.
Sampling
- Target population: the entire group of interest to the researcher.
- Accessible population: the portion of the target population that can be easily sampled.
- Probability sampling: methods where every member of the population has a known chance of being selected. Includes simple random sampling, stratified random sampling, systematic sampling, and cluster sampling.
- Non-probability sampling: methods where not every member of the population has a known chance of being selected. Includes convenience sampling and quota sampling.
Sampling Error
- The difference between the sample statistic (e.g., mean, proportion) and the true population parameter
- Standard error of the mean (SEM) measures the variability of sample means from the true population mean.
- Larger samples typically result in lower sampling error.
Sampling Bias
- When the sample doesn’t representative of the population.
- This is common with non-probability sampling, when individuals are chosen based on accessibility e.g., student groups.
Research Questions
- There are three broad categories of research questions:
- Exploratory: to simply observe something or describe an outcome without testing hypotheses.
- Descriptive: to describe the characteristics or a sample without testing hypotheses.
- Relational: relating different variables, e.g. cause and effect.
Analyzing Experimental Data
- Methods used to compare and quantify differences between groups in experimental studies.
- T-tests are used to compare means or averages between two groups
- ANOVA is used to compare means or averages between three or more groups.
Quasi-Experimental Designs
- Quasi-experimental designs lack the complete control over factors that true experimental designs exhibit.
- Cannot determine cause and effect relationships.
Qualitative Studies
- Holistic understanding: a comprehensive and all encompassing grasp of complex phenomena,
- Big data: large and complex datasets that require advanced tools.
- Thick data: qualitative, context-rich information that provides deeper insights into human behavior—often collected through ethnography, interviews, and narratives.
- Trustworthiness: The assessment tools for credibility, transferability, dependability, and confirmability used to assess the quality of qualitative studies.
Types of Qualitative Studies
- Phenomenology.
- Ethnography.
- Case Studies.
Measurement in Surveys
- Open-ended items
- Partially open-ended items
- Restricted items
Correlation
- Correlation coefficient: a statistical measure of the strength and direction of the linear relationship between two variables (Pearson's r). Ranges from -1 to +1.
- Direction (positive vs. negative) reflects how the variables move together.
- Strength reflects the magnitude of the linear relationship.
- Values close to +1 or −1 indicate strong relationships whereas values close to zero indicate weak or no linear relationships,
- Does not indicate causation.
- Linear regression can use the correlation coefficients to create a line of best fit for analysis.
Regression
- Regression describes the relationship between dependent and independent variables.
- Regression lines fit the data and can be used for prediction.
- Coefficient determination (r2): measures the proportion of variance in one variable that can be explained by the variance in the other variable.
Types of Correlation
- Positive correlation: as one variable increases, the other tends to increase.
- Negative correlation: as one variable increases, the other tends to decrease.
- There can be no correlation; as one variable changes, the other one does not change.
Regression Assumptions
- Linearity: assumes a linear relationship between the variables.
- Normality: assumes that the residuals (differences between observed and predicted values) are normally distributed.
- Homoscedasticity: assumes that the variability of the dependent variable is constant across the range of the independent variable.
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Description
Explore the fundamental concepts of reliability in psychology, including test-retest reliability and internal consistency. Understand how these measures ensure the accuracy and consistency of observations. Dive into the significance of Cronbach's alpha and correlation in assessing reliability.