East Carolina University
Department of Psychology
ANOVA, Analysis of Value -- Is your research worth anything? (humor)
ANOVA, Half-Tailed Tests -- ANOVA, F, t, directional tests, and the foolishness of "post hoc" power analysis.
ANOVA2-Followup -- heterogeneity of variance in the factorial ANOVA in Howell (grad) page 404
Beyond Significance Testing -- my notes from the text by Rex B. Kline (2004).
Canonical -- why is it called "canonical" correlation?
Comparing Correlated but Nonoverlapping Correlation Coefficients -- the Pearson-Filon statistic and the ZPF statistic
Comparing Reliability Coefficients -- procedures for comparing one reliability coefficient to another
Confidence Interval for R2 -- putting a confidence interval on R2
Contingency Tables, Low Expected Frequencies -- Is this a problem or not?
Correlation and Causation -- When does correlation imply causation?
Data-Help -- suggestions on setting up a data file
Dichotomizing Continuous Variables -- a bad idea: Discussion from Edstat-L.
Eigenvalues -- origin of the term
Excel: Column Headers -- Print column headers atop each page of Excel output
Excel: Error Bars -- Using Excel to Create a Plot of Group Means With Error Bars
Excel: Sum Cells -- Summing Cells in Excel. Shows how little I know about Excel.
Exploratory Factor Analysis -- review of 1999 article by Fabrigar et al.
e-history -- base of the natural log
EX16-11 -- from Howell's fundamentals text, page 333
Exact-P -- discussions on the use of exact p values
HOWL13-6 -- exercise 13-6 from the Fundamentals text
IV-DV -- Independent and Dependent Variables
KR20 -- Kuder-Richardson 20
Kurtosis -- discussion of kurtosis
Likert -- what is a Likert scale and how do you pronounce "Likert?"
Linear Models -- Games to help the student learn about linear model, correlation, and regression.
Logit -- pronunciations of the word
LESSONS -- these are my online lecture notes for my stats classes
Low Power, Low Reliability -- Is it a big problem when results are significant?
Meta-Analysis -- instructional material, effect size calculator spreadsheet, and computational macros for SPSS, SAS, and Stata
Monty Hall Dilemma-- would you switch doors?
Missing Data -- suggested readings on the topic of how to deal with missing data
NHST-SHIT -- Jack Cohen's wit and a list of references on significance testing.
NHST-Quiz-- A little True-False quiz to test your understanding of Statistical Hypothesis Inference Testing
Nonparametrics -- common misconception that nonparametrics have no assumptions
Norm-Sample Comparison -- comparing your sample mean and variance to that of a normative group
Normality Assumption -- EDSTAT-L discussion on checking data for compliance with an assumption of normality
Omega-Squared -- advice on interpreting the omega-squared statistic
OPSCAN -- using OPSCAN data sheets in your research
Pairwise Comparisons -- discussion of pairwise/multiple comparisons procedures, including common misconceptions about them
Path-Matrix -- using matrix algebra to get effect coefficients in path analysis
Pitman's T -- testing variances with correlated samples
Poems -- Poems about statistics
POWER -- Tools for conducting power analysis
Power, A Posteriori -- Foolishness
Probability of Replication -- is this new statistic of any value?
Regress-History -- origin of the term "regression"
Reliability -- a few notes on reliability from Nunnally's text
Resampling Statistics -- a brief introduction to bootstrapping and permutation/randomization tests
Reversal-Paradox -- discussion of the reversal paradox
SAS -- help using the SAS stat pack
Scales-Transform -- nonlinear data transformations
Signif-Testing -- why Frank Schmidt thinks significance testing the devil's work
Simpson -- Simpson's paradox, with bibliography
Skew -- location of mean, median, mode in skewed distributions
Split in Half --Splitting a data file into two random halves
SPSS -- Help using the SPSS stats pack
SPSS2Excel2SAS -- write SPSS data to Excel and then bring into SAS
SS-Type -- different types of sums of squares
Standardized Confidence Intervals -- why not standardize confidence intervals
STATISTICAL METHODS IN PSYCHOLOGY -- Support page for David Howell's Outstanding Text
Stepwise -- stepwise procedures are the devil's work
t-CLT -- nonrobustness of the t statistic
t-Crit -- t approximated by z and some criticisms of significance testing
Tests of Equivalence and Confidence Intervals for Effect Size Estimates
Type I Errors -- How frequent are Type I errors in the published literature?
Type-I-II-Errors -- Evaluating the Relative Seriousness of Type I versus Type II Errors in Classical Hypothesis Testing
Type III Errors -- Correctly rejecting the null but incorrectly inferring the direction of effect

Contact Information for the Webmaster,
Dr. Karl L. Wuensch
This page most recently revised on 18. April 2008