Assessment, Statistics, and Research

  Regression to the mean is a statistical concept based on evidence that a sample of data representing extreme values from the population mean will likely be close to the mean the next time a sample is taken. In psychological testing, people who obtain extreme scores on a test tend to obtain scores closer to the mean on a second testing. That is, high scorers tend to earn lower scores and low scorers tend to earn higher scores. The term, Regression to the Mean is sometimes referred to as RTM. The concept appears in a paper by British scientist Sir Francis Galton (1886). Notes I originally published this post in the Sutton (2024) location referred to in references. This is a copy of that post. I created the image in Microsoft designer. References Galton, F. (1886). Regression towards mediocrity in hereditary stature.  The Journal of the Anthropological Institute of Great Britain and Ireland , 15, 246-263. Sutton, G. W. (2024, January 5). Regression to the mean.  Psychology...

 Frugal models or simple rules are prediction models using only a few variables. The approach is based on findings that in behavioural research many predictors are correlated with each other thus, a few variables with minimal to zero intercorrelations may be more powerful and simpler to understand and use. Please check out my website     www.suttong.com    and see my books on    AMAZON         or   GOOGLE STORE Also, consider connecting with me on     FACEBOOK     Geoff W. Sutton         TWITTER    @Geoff.W.Sutton     You can read many published articles at no charge:   Academia    Geoff W Sutton       ResearchGate    Geoffrey W Sutton    

 Cross-validated correlation refers to validating relationships between studied variables in a new sample. Please check out my website     www.suttong.com    and see my books on    AMAZON         or   GOOGLE STORE Also, consider connecting with me on     FACEBOOK     Geoff W. Sutton         TWITTER    @Geoff.W.Sutton     You can read many published articles at no charge:   Academia    Geoff W Sutton       ResearchGate    Geoffrey W Sutton    

  Regression is a statistical procedure used to predict values on a criterion variable from the knowledge of values obtained on a predictor variable. For example, an organization may use an employment screening test or survey that has been useful in the past to predict how well employees perform a particular type of job. The criterion variable is a continuous variable, meaning it can have a range of score values. Predictor variables may be either continuous or categorical variables. When there is only one predictor variable and one criterion variable, the procedure is known as simple regression .   Read more about regression in these books. Applied Statistics on AMAZON or GOOGLE Creating Surveys on AMAZON or GOOGLE Checkout My Page     www.suttong.com    My Books   AMAZON         and            GOOGLE STORE   FOLLOW me on    FACEBOOK...