Dr Mircea Zloteanu 🌺🌞🍃#statstab #425 Providing a Lower-Bound Estimate for Psychology’s “Crud Factor”
Thoughts: Psych research may not have the tools to investigate very small effects at all!
#crudfactor #research #psychology #mesurement #error #effectsize
#statstab #422 Measuring Pickle Fanaticism: An Open Dataset for Teaching Instrument Development
Thoughts: Teaching tool for learning about measurement validation and development.
#mesurement #questionnaire #survey #psychometrics #efa #factoranalysis
#statstab #420 {misty} item.alpha: Coefficient Alpha, Hierarchical Alpha, and Ordinal Alpha
Thoughts: If #419 and #418 made you consider reporting ordinal alpha, here is a package to do it
#ordinal #likert #reliability #psychometrics #mesurement #rstats
https://www.rdocumentation.org/packages/misty/versions/0.7.4/topics/item.alpha
item.alpha function - RDocumentation
<p>This function computes point estimate and confidence interval for the coefficient alpha (aka Cronbach's alpha), hierarchical alpha, and ordinal alpha (aka categorical alpha) along with standardized factor loadings and alpha if item deleted. By default, the function computes coefficient alpha based on unweighted least squares (ULS) parameter estimates using pairwise deletion in the presence of missing data that provides equivalent results compared to the formula-based coefficient alpha computed by using e.g. the <code>alpha</code> function in the <span class="pkg">psych</span> package by William Revelle (2025).</p>
#statstab #419 A Measurement Is a Choice and Stevens’ Scales of Measurement Do Not Help Make It: A Response to Chalmers
Thoughts: #418 convincing for not adopting ordinal α? This rebuttal may change your mind
#ordinal #likert #mesurement #psychometrics #cronbachalpha #reliability #testtheory #CTT #scales #debate #rebuttal
A Measurement Is a Choice and Stevens’ Scales of Measurement Do Not Help Make It: A Response to Chalmers - Bruno D. Zumbo, Edward Kroc, 2019
Chalmers recently published a critique of the use of ordinal α proposed in Zumbo et al. as a measure of test reliability in certain research settings. In this r...
#statstab #408 Factor analysis: Overrated, Misused, But Still Useful
Thoughts: Some scholars favour CFA over EFA, but this post reverses that perspective. Do you agree?
#factoranalysis #cfa #efa #psychometrics #validity #mesurement
#statstab #379 {projoint} is a general-purpose R package for conjoint analysis
Thoughts: "produces more reliable estimates of the quantities of interest". Allow multiple causal estimates
#conjointanalysis #conjoint #mesurement #error #mesurementerror #R
#statstab #372 The Monotonic Linear Model: Testing for Removable Interactions
Thoughts: Psychologists take their measures for granted. Read about the various forms these can take.
#mesurement #theory #SDT #operationalism #monotonic #psychometrics #error