lecture15 - Psych 100A Winter 2010 Lecture 15: One-Factor...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Psych 100A Winter 2010 ctu 15: On c t Bt n Lecture 15: One-Factor Between- Subjects Analysis of Variance
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
One-factor multilevel design • One-factor multilevel design is also called a one-way multilevel design – A type of experiment with one independent variable that has three or more levels st cannot be used to analyze this kind of design A t test cannot be used to analyze this kind of design – Instead, an analysis of variance (ANOVA) is used to test statistical hypotheses with this experimental design
Background image of page 2
he problem with using Many t- The problem with using Many t tests • When we have three groups there are 3 two- way comparisons • Four groups, 6 two-way comparisons groups N*(N )/2 two ay comparisons • N groups, N*(N-1)/2 two-way comparisons
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Type I error rate increases
Background image of page 4
etter Alternative: One ctor Better Alternative: One-factor Between-Subjects ANOVA • Assumptions regarding the study design he scores in each sample are drawn randomly The scores in each sample are drawn randomly from the population – The scores are drawn independently – The scores in the populations sampled are normally distributed – The variances of the scores in the population are equal
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
raphical Depiction Graphical Depiction
Background image of page 6
Terms rand mean Grand mean – Symbolized as he mean for all of the scores in the experiment G X The mean for all of the scores in the experiment • Mean square – Symbolized as MS – Another term for variance, used in ANOVA • Within-groups error variance – Symbolized as MS Error – Measures only the error variance
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Terms (continued) • Between-groups variance – Symbolized as MS A
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/15/2010 for the course PSYCHOLOGY 100B taught by Professor Firstenberg,i. during the Winter '10 term at UCLA.

Page1 / 26

lecture15 - Psych 100A Winter 2010 Lecture 15: One-Factor...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online