Analyzing Data

• What is the difference between a type I and type II error?
• What is the difference between floor effects and ceiling effects?
• How is a linear relationship different from a nonlinear/curvilinear relationship?
• Are linear relationships helpful or harmful to a study?
• How is a positive linear relationship different from a negative linear relationship?
• How does confounding impact the research?
• How is validity different from reliability?
• How is a between-subjects ANOVA different from a within-subjects ANOVA?
• What is the difference between bimodal distribution and unimodal distributions?
• What are the advantages/disadvantages of secondary data analysis?
• How is interitem reliability different than interobserver reliability?
• How is continuous data different than categorical data?
• How does variability impact research findings?
• What is the difference between descriptive statistics and inferential statistics?
• What are the criticisms of hypothesis testing?
• How do I calculate a sample size?
• When do I use univariate analysis?
• When do I use multivariate analysis?
• How do I choose the appropriate statistical test for my data?
• How do I create dummy variables?
• How do I control for familywise error?

General

• General tips
• Marginal significance
• Tips/tricks for using SPSS
• What are "Descriptive Statistics"?
• What are "Inferential Statistics"?

Data Screening

• What is the purpose of data screening/cleaning?
• Tips/tricks for Data cleaning
• Checking Data Entry

Missing Values

• Why do missing values occur?
• Why is missing data a problem?
• How do I identify if missing values are random or non-random?
• How do I deal with missing data?

Outliers

• What are outliers?
• Should I check for outliers?
• How can I tell if outliers are influencing my data?
• How do I detect univariate outliers in my data?
• How do I detect bivariate and multivariate outliers in my data?
• How do I deal with outliers?

► Normality

• What is "normality"?
  
• Why is normality important?
  
• How do I determine whether my data are normal?
  
• How do I deal with non-normality?
  
• How do I transform variables?
  
• What is absolute change?
• What is absolute difference?
• What is the 68-95-99.7 rule?
• What is absolute error?
• What is boredom effect?
• What is adjusted R^2?
• What is bias?
• What are the types of bias?
• What is bimodal?
• What is grand mean?
• What is main effect?
• What are floor effects?
• What is the median?
• Wnat is a normal distribution?
• What is goodness-of-fit?
• What is a Type I error?
• What is a Type II error?
• What is bivariate correlation?
• What is test-retest reliability?
• What is effect size?
• What is the latent variable?
• What are ceiling effects?
• What is a positive linear relationship?
• What is parsimony?
• What is sampling error?
• What is factorial ANOVA?
• What is sampling bias?
• What is a one-tailed test?
• What is observer drift?
• What is a one-tailed test?
• What is the coefficient of determination?
• What is correlation?
• What is negative correlation?
• What is univariate statistics?
• What is central tendency?
• What are the different types of central tendency?
• What is a selection bias?
• What is a linear relationship?
• What is a nonlinear relationship?
• What is a positive correlation?
• What is an ecological fallacy?
• What is inference?
• What is a representative sample?
• What is a direct relationship?
• What is confirmation bias?
• What is participation bias?
• What is raw data?
• What is a spurious relationship?
• Statistical Tests

- Meta-analysis
- Mediation
- What is an Interaction?
- Interaction between two continuous variables
- Interaction between categorical and continuous variables
- What is a correlation?
- What is a partial correlation?
- What is a point-biserial correlation?
- What is regression?
- What is a probabilistic causal analysis?
- What is analysis of covariance (ANCOVA)?

• What is analysis of variance (ANOVA)?
• What is a one-way ANOVA?
• What is the difference between one-way analysis of variance and two-way analysis of variance?
• Other

- What is a scatterplot?
- What is linearity?
- Want help using SPSS?
- What is "syntax" in SPSS?
- What is Computational Modeling?
- What is a rank-based nonparametric test?

• What is alpha?
• What is a manipulation check?
• How does one conduct a manipulation check?
• Transforming continuous into categorical variables

- Why transform continuous variables into categorical variables?
- How to dichotomize variables?
- Why cut into thirds or fourths instead of dichotomizing?

• Composites

- How do I create a composite of items?
- Why create a composite of items?
- How do I know when it is appropriate to create a composite?
- How do I create a composite with items with different scale ranges?
- How do I create a composite with items labeled in opposite directions?

• What is generalizability?
• What are the types of reliability?
• What are marginal means?
• What are beta weights?
• What are paired-samples t-test?
• What is a between-subjects ANOVA?
• What is a bimodal distribution?
• What is unimodal?
• What is a confirmatory factor analysis?
• What is a pairwise comparison?
• What is a secondary data analysis?
• What is a robust procedure?
• What is best fit line?
• What is analysis of covariance?
• What is Cohen's d?
• What is inter-item reliability?
• What is left-skewed distribution?
• What is power?
• What is statistical significance?
• What is the central limit theorem?
• What is the restriction of range?
• What is quantitative data?
• What is regression to the mean?
• What is a one-way design?
• What is a randomized factorial design?