\(\newcommand{L}[1]{\| #1 \|}\newcommand{VL}[1]{\L{ \vec{#1} }}\newcommand{R}[1]{\operatorname{Re}\,(#1)}\newcommand{I}[1]{\operatorname{Im}\, (#1)}\)

Correlation, regression, statistics on brain images

Project discussion

• mentors;
• teams.

Activation

• Reshaping 4D images to 2D arrays;
• Slicing with boolean vectors;
• First go at brain activation exercise.

Correlation and projection

• vector angles;
• correlation and projection;
• Pearson 1D and 2D function exercise exercise.

Correlation in practice

• Voxel time courses;

• stimuli.py file;

• test_stimuli.py file;

• pip install pytest
  py.test test_stimuli.py
  

Then one of:

• Voxel correlation exercise;
• Correlation per voxel, in 2D.

Simple and multiple regression

• introduction to the General Linear Model;
• simple regression;
• multiple regression with confounds.

Reading and homework for next week

• Do exercises from last week’s lab: Git workflow exercises;
• Continue work on outlier detection project for Monday next week.