Resources for Learning Psychology
05/16/2025
New Video! The Sampling Distribution of the Mean and Standard Error
The Sampling Distribution of the Mean & Standard Error In this video I explain the sampling distribution of the mean, a comparison distribution for thinking about the probability of different mean values selected...
05/01/2025
New video! Statistical Significance & Probability Values
Statistical Significance & Probability Values In this video I explain the concept of statistical significance, including alpha levels, probability values (p-values) and the critical region or rejection r...
02/09/2025
New video! The Logic of Null Hypothesis Significance Testing
The Logic of Null Hypothesis Significance Testing (NHST) In this video I explain the logic of null hypothesis significance testing and how researchers use a null hypothesis and a comparison distribution or sampling...
10/16/2024
New video! How to Use a Z-Table (Standard Normal Table)
How to Use a Z Table (Standard Normal Table) In this video I explain how to use a z-table or a standard normal table in order to calculate the percentage of scores below, above, or between z-scores for ...
08/14/2024
New Video on the Psych Exam Review YouTube channel!
The Standard Normal Curve, Empirical Rule, & Z-Scores In this video I explain how we can use the equation for a normal curve to generate a probability density function and use that to estimate probabilities. Whi...
06/24/2024
Didn't know "Don't Mess with Texas" started as an anti-litering campaign slogan in 1985 (from Thaler & Sunstein's "Nudge")
06/21/2024
New video on the PsychExamReview YouTube channel: What is a Probability Density Function? https://psychexamreview.com/what-is-a-probability-density-function/
05/30/2024
New video on the Psych Exam Review YouTube channel: How Are Moments Used in Statistics?
How Are Moments Used in Statistics? In this video I explain how moments are used in statistics in order to describe the characteristics of a distribution. The first four moments help to tell us...
05/25/2024
New video on the PsychExamReview YouTube channel: What is Kurtosis?
What is Kurtosis? In this video I explain the concept of kurtosis. I explain the terminology for kurtosis coined by Karl Pearson, a number of common misconceptions related to...
10/07/2023
Psychology in 22 Minutes - a comprehensive overview of the subfields of psychology and how they fit together
Psychology in 22 Minutes In this video I provide a comprehensive overview of the many subfields of psychology and how these fit together to provide a deeper understanding of the comp...
09/21/2023
New video! Skewness: Floor & Ceiling Effects
Skewness: Floor & Ceiling Effects In this video I explain how skewness in a sample may be caused by a floor or a ceiling effect, in which the measurement isn't able to capture variability at ...
New video explaining positive and negatively skewed distributions
Skewness - Positive & Negative Skew In this video I explain one way in which a distribution can deviate from normality, which is skewness. I explain the difference between positive and negative...