R: Function to convert scores to "conventional " metrics

rescale {psych} | R Documentation

## Function to convert scores to “conventional " metrics

### Description

Psychologists frequently report data in terms of transformed scales such as “IQ" (mean=100, sd=15, “SAT/GRE" (mean=500, sd=100), “ACT" (mean=18, sd=6), “T-scores" (mean=50, sd=10), or “Stanines" (mean=5, sd=2). The `rescale` function converts the data to standard scores and then rescales to the specified mean(s) and standard deviation(s).

### Usage

    rescale(x, mean = 100, sd = 15,df=TRUE)

### Arguments

`x` | A matrix or data frame
`mean` | Desired mean of the rescaled scores- may be a vector
`sd` | Desired standard deviation of the rescaled scores
`df` | if TRUE, returns a data frame, otherwise a matrix

### Value

A data.frame (default) or matrix of rescaled scores.

### Author(s)

William Revelle

### See Also

See Also `scale`

### Examples

    T <- rescale(attitude,50,10) #all put on same scale
    describe(T)
    T1 <- rescale(attitude,seq(0,300,50),seq(10,70,10)) #different means and sigmas
    describe(T1)

[Package psych version 1.7.3.21 Index]