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Lecture 14

Lecture 14 – Single Subject Designs.docx

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Department
Kinesiology
Course
KIN 330
Professor
Peter Hall
Semester
Winter

Description
Lecture 14 – Single Subject Designs We’ve previously looked at within subjects, between subjects. Now we are looking at  Single Subjects, why? • To study extremities Necessary conditions of causality.. (must meet the 3 conditions) • Assuming A is the purported cause of B o 1. Covariation (change in A and change in B are correlated) o 2. Temporal precedence (change in A precedes change in B) o 3. Exclusivity (∆A, and only ∆A, are associated with ∆B) Types of Single Subject Designs: • Classic AB design o Graph:  Has covariation and temporal precedence. BUT we don’t know  that if it has exclusivity (ie. took steroids at week 11, or started  working out more after watching Olympics at week 11) o Stable baseline characteristics give you power to establishing exclusivity  Favorable conditions are Stable Flat baseline or Stable  Accelerating Baseline  Variable flat and decelerating baseline have too much noise o Control period in SSD is functionally equal to control group in traditional  experimental design o Control leads to VALIDITY of conclusion that the treatment does indeed  change the DV o What’s missing to draw more firm conclusions?
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