Beyond Luck: The Psychological and Statistical Power of 5 Leaf Clover Jewelry Have you ever scanned a patch of green grass, desperately hoping a rare four-leaf clover would catch your eye? Finding one feels like a momentary victory over the universe. But discovering a five-leaf clover is an astronomical feat, representing a literal one-in-a-million event.
SPSS PROCESS Macro Tutorial By Ruben Geert van den Berg under Regression Downloading & Installing PROCESS Creating Tables instead of Text Output Using PROCESS with Syntax PROCESS Model Numbers PROCESS & Dummy Coding Strengths & Weaknesses of PROCESS What is PROCESS? PROCESS is a freely downloadable SPSS tool for estimating regression models with mediation and/or
SPSS Label Cleaning Tool By Ruben Geert van den Berg under SPSS Tools We sometimes receive data files with annoying prefixes or suffixes in variable and/or value labels. This tutorial presents a simple tool for removing these and some other “cleaning” operations. Prerequisites and Installation Example I – Text Replacement over Variable and Value Labels
SPSS Moderation Regression Tutorial By Ruben Geert van den Berg under Regression SPSS Moderation Regression – Example Data SPSS Moderation Regression – Dialogs SPSS Moderation Regression – Coefficients Output Simple Slopes Analysis I – Fit Lines Simple Slopes Analysis II – Coefficients A sports doctor routinely measures the muscle percentages of his clients. He also
SPSS Mean Centering and Interaction Tool By Ruben Geert van den Berg under SPSS Tools & Regression Also see SPSS Moderation Regression Tutorial. Regression with Moderation Effect Downloading and Installing the Mean Centering Tool Using the Mean Centering Tool Mean Centering Tool – Results A sports doctor wants to know if and how training and
Split-Half Reliability in SPSS By Ruben Geert van den Berg under Factor Analysis Quick Data Screening SPSS Split-Half Reliability Dialogs SPSS Split-Half Reliability Output Spearman-Brown & Horst Formulas Specifying our Test Halves A psychologist is developing a scale to measure “emotional stability”. She therefore administered her 15 items to a sample of N = 924
What is a T-Test? Types, Assumptions, and Calculations Explained Let’s be honest for a moment. For many of us in the mental health field, the word “statistics” triggers a mild fight-or-flight response. We entered this profession to understand the human mind, to help people navigate trauma, and to foster growth, not necessarily to crunch numbers.
Understanding Measurement Reliability and Validity A concerned parent takes their child to a psychologist to be assessed for ADHD. The clinician runs a battery of tests and concludes the child has the disorder. Seeking a second opinion, the parent visits a different psychologist a week later. Using the same tools, this new clinician concludes the
Process Capability: Measuring Mental Consistency & Potential Imagine a bakery. The air smells of vanilla and warm sugar. The baker’s goal is simple: produce thousands of muffins that are exactly the same size, shape, and weight. But humans aren’t muffins. And our minds aren’t factories. In my years working with clients, one of the most
Finding the “Best Fit”: An Intuitive Guide to Maximum Likelihood Estimation The Fear of the Unknown (and Statistics) If there is one thing that unites psychology students and mental health professionals across the globe, it is often a shared, quiet anxiety regarding one specific subject: Statistics. We entered this field to understand the human mind,