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## Correlation |

The Correlation model allows correlating the time vectors in each pixel with an arbitrary reference signal, for instance an activation vector.

Acquisition and Data Requirements

Image Data |
Any dynamic volume data. |

Model Preprocessing

The reference signal will be used for the pixelwise correlation must be defined as a file or as a VOI.

Index |
The index of the element in the cross correlation vector to return as rc. |

It is shown in the Results panel of model preprocessing.

Model Configuration

Images of the following parameters can be generated

r |
Pearson correlation coefficient. |

p |
Significance level, at which the null hypothesis of zero Pearson correlation is disproved. |

z |
Fisher's z for Pearson correlation. |

rr |
Spearman's rank correlation. |

rs |
Two-sided significance that rank correlation deviates from zero. |

rc |
The value of the signal cross correlation vector a the index defined below. |