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Paired t-Test: Cartoon Data
Signal
Condition
# 1
Condition
# 2
¥ Paired means that samples in different conditions should be linked together (e.g., from same subjects)

¥ Test determines if differences between conditions in each pair are ÒlargeÓ compared to SEM of the differences

¥ Paired test can detect systematic intra-subject differences that can be hidden in inter-subject variations

¥ Lesson: properly separating inter-subject and intra-subject signal variations can be very important!
¥ Significantly different!
¥ Condition #2 > #1, per subject
paired
differences
paired data
samples:
same numbers
as before