Cheat Sheet: From Linear Algebra to Significance
“Neural Activity”
in region R
“…significant decrease
in activation (p < 0.05)
in region R during
presentation of …”
•Linear Algebra
•GLM
•Statistics
Glossary:
𝛽Scalar Values
Ԧ𝑥 Vector
𝑋Matrix
𝑋𝑇Matrix transpose
Ԧ𝜖 i.i.d. noise vector
𝑛,𝑚 dimensions
What fMRI data has to do with Linear Algebra
Time Series extracted
in region R
How do we test for an effect
of experimental factors?
Can we explain the
signal as a linear
combination of our
regressors?
20
2
1
10
20
2
1
0
1
1
1
1
1
y
y
y
=𝛽0⋅+ 𝛽1⋅
