**Select menu: Stats | Mixed Models (REML) | Multiple Experiments/Meta Analysis**

This provides facilities for the analysis of multiple experiments or meta-analysis data using the method of residual maximum likelihood (REML), which is also sometimes called restricted maximum likelihood. The data should be supplied in a single variate with a factors to specify the different experiments.

- After you have imported your data, from the menu select

**Stats | Mixed Models (REML) | Multiple Experiments/Meta Analysis**.

*OR*

**Stats | Meta Analysis | REML of Multiple Experiments**.

- Fill in the fields as required then click
**Run**.

You can set additional Options then after running, you can save the results by clicking Save.

## Available data

This lists data structures appropriate to the current input field. The contents will change as you move from one field to the next. Double-click a name to copy it to the current input field or type the name.

## Y-variate

Specifies a variate containing the data values.

## Fixed model

The fixed model describes imposed treatment factors and covariates for which the effect of specified levels or values are of interest. The model is described using a formula, which can combine main effects and interactions of factors and also covariates.

## Random model

The random model is generally used to describe those factors for which the values present in an experiment can be considered drawn from some large homogeneous population. The model is described using a formula, which can combine main effects and interactions of factors and also covariates.

## Experiments

Specifies a factor defining the different experiments to which each data unit belongs. You can set a different residual term for each level of the factor by clicking the **Experiment residual terms** button.

## Experiment residual terms

Lets you define residual terms for each of the experiments.

## Interactions

Controls the level of interactions to be fitted – you can indicate either **All interactions**, or just main effects (**No interactions**), or indicate the level of interaction (that is, set a limit on the maximum number of factors in the treatment terms that are fitted).

## Operators

This provides a quick way of entering operators in the fixed and random model formulas. Double-click on the required symbol to copy it to the current input field. You can also type in operators directly. See model formula for a description of each.

## See also

- REML Meta Analysis Terms for specifying residual terms for the different experiments
- Multiple Experiments/Meta Analysis (REML) Options for specifying output options
- Linear Mixed Model Further Output for additional output after fitting a model
- Linear Mixed Models Save for saving the results from a REML analysis
- VRESIDUAL command for defining residual terms for experiments
- REML directive for command mode use of REML, with additional options to control the algorithm and for more sophisticated analyses.
- REML Predictions menu for forming predictions.