View source: R/testMauchlySphericity.R

MauchlySphericityTest | R Documentation |

Performs a test of sphericity on a dataframe with multiple measures, one subject per line. It assesses the significance of the null hypothesis that the covariance matrix is spherical. This test is described in \insertCitea10superb

```
MauchlySphericityTest(dta, cols)
```

`dta` |
A data frame containing within-subject measures, one participant per line; |

`cols` |
A vector indicating the columns containing the measures. |

p the p-value of the null hypothesis that the data are spherical.

```
# creates a small data frames with 4 subject's scores for 5 measures:
dta <- data.frame(cbind(
col1 <- c(3., 6., 2., 2., 5.),
col2 <- c(4., 5., 4., 4., 3.),
col3 <- c(2., 7., 7., 8., 6.),
col4 <- c(6., 8., 4., 6., 5.)
))
# performs the test (here p = 0.5824)
MauchlySphericityTest(dta)
```

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