# Psych 2800 USU Exam 3

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1. ﻿ANOVA:
Analysis of Variance
2. Factor:
the variable (independent or quasi-independent) that designates the groups being compared in analysis of variance
3. Levels:
the individual conditions or values that make up a factor
4. Between treatments variance:
variability in scores that is due to differences between the levels of the independent variable
5. Within treatments variance:
variability in the scores that is due to measurement error or individual difference (chance)
6. Mean squares:
term used to describe variance in ANOVA
7. F-ratio:
the test statistic for the ANOVA
8. Error term:
the denominator of the F-ratio; provides a measure of variance due to chance
9. Post hoc tests:
additional hypothesis tests that are done after an analysis of variance to determine exactly which mean difference are significant and which are not
10. Experimentwise alpha level:
the overall probability of a Type 1 error that accumulates over a series of separate hypothesis tests – usually substantially greater than the stated or “nominal” alpha for any of the individual tests
11. eta squared (h2):
percentage of variance in dependent variable accounted for by the manipulation (Independent variable)
12. Estimation:
the inferential process of using sample statistics to estimate population parameters
13. Point estimate:
a single number used as an estimate of an unknown population parameter
14. Interval estimate:
a range of values that is used as an estimate of an unknown population parameter
15. Confidence interval:
an interval estimate that is accompanied by a specific level of confidence or probability
16. Repeated measures study:
within-subjects study - a study in which a single sample of individuals is measures more than once on the same dependent variable
17. Matched subjects study:
each individual in a sample is matched with an individual in the other sample; subjects are matched either because they are similar on a variable of interest (e.g., IQ, sex)
18. Difference score:
D = X1 – X2 – the difference between the matched scores (i.e., between the first and second scores of an individual in a repeated measures design or between the scores of the two related individuals in a matched subjects design)
19. Estimated standard error for MD:
the average or typical distance of a single difference score from the population difference score
20. Carryover effects:
participant’s response in the second treatment is altered by lingering aftereffects of the first treatment
21. Progressive error:
participant’s performance or response changes consistently over time

## Card Set Information

 Author: Anonymous ID: 226322 Filename: Psych 2800 USU Exam 3 Updated: 2013-07-08 17:32:51 Tags: Psych 2800 USU Exam Folders: Description: Vocabulary from the study guide for exam 3 Show Answers:

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