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What's New in SPSS Statistics 29

This release includes a new survival model procedure, open source extension procedures, UI and workbook enhancements.

New procedures

Linear OLS Alternatives

Elastic Net
The new linear elastic net extension procedure estimates regularized linear regression models for a dependent variable on one or more independent variables.

Lasso
The new linear lasso extension estimates L1 loss regularized linear regression models for a dependent variable on one or more independent variables, and includes optional modes to display trace plots and to select the alpha hyperparameter value based on cross validation.

Ridge
The new linear ridge extension procedure estimates L2 or squared loss regularized linear regression models for a dependent variable on one or more independent variables, and includes optional modes to display trace plots and to select the alpha hyperparameter value based on cross validation.

Parametric Accelerated Failure Time (AFT) Models
The new procedure invokes the parametric survival models procedure with non-recurrent life time data. Parametric survival models assume that survival time follow a known distribution, and this analysis fits accelerated failure time models with their model effects proportional with respect to survival time.

Pseudo-R² measures in Linear Mixed Models and Generalized Linear Mixed Models
Pseudo-R² measures and the intra-class correlation coefficient are now included in Linear Mixed Models and Generalized Linear Mixed Models output (when appropriate). The coefficient of determination R² is a commonly reported statistic, because it represents the proportion of variance explained by a linear model. The intra-class correlation coefficient (ICC) is a related statistic that quantifies the proportion of variance explained by a grouping (random) factor in multilevel/ hierarchical data.

Workbook mode enhancements
Two new workbook toolbar items have been added: Show/Hide all syntax windows and Clear all output. There is also a new button on the Status bar to switch between Classic (Output and Syntax) and Workbook modes.

Search enhancements
The Search feature now provides options for entering terms directly in a toolbar field and for viewing results in a drop-down pane.

What's New in SPSS Statistics 28

Plaese read more about new features in version 28:

New Features (PDF, 5 pages)