Study Questions for Quiz #3
1. Describe the dimensions/attributes used to organize
the variety of single-factor research designs and explain under what conditions
results from which of the resulting designs may be causally interpreted.
2. Describe the advantages of multiple condition
designs, the different kinds of conditions that may be included and how a
researcher decides which conditions to include in a research project.
3. Tell the different types of variables involved
in a design and how one decides the role of a variable in a particular study.
4. Describe the different ways of controlling potential
confounds (be sure to address both subject and procedural variables) and tell
why “equivalent on the average” is sufficient to allow causal interpretability
of research results.
5. What is the H0: for ANOVA when applied to a multiple
condition design? What is the limitation
of this procedure, and what do we do to accompany this initial test? How do we choose which follow-up procedure to
use?
6. What is "alpha inflation" and how does one
calculate the extent of it for a given set of ANOVA follow-up analyses?
Describe the three ways to assess Experiment-wise Type I error. Which of these do you prefer? Explain your answer carefully.
7. Be prepared to describe each of the following
pairwise comparison methods, or to compare and contrast any pair.
Fisher's LSD Fisher's
protected t-test Tukey's
HSD Scheffe's
Bonferronni/Dunn's
Analytic Comparisons & Trend Analyses
8. Distinguish between simple comparisons, complex
comparisons, trend analyses and pairwise comparisons and tell when the results
from each of these can be causally interpreted.
9. Distinguish
the information obtained from a trend analysis versus from a series of pairwise
comparisons and give a carefully explained example of each being used when the
other should have been.
k-group X²
10. What is the H0:
for X² when applied to a multiple condition design? What is the limitation of this procedure, and
what do we do to accompany this initial test? How do we choose which follow-up
procedure to use?
11. What is "alpha inflation" and how
does one calculate the extent of it for a given set of X² follow-up analyses? Describe
the three ways to assess Experiment-wise Type I error. Which of these do you prefer? Explain your answer carefully.
Correlations & Comparisons
12 Describe how to
identify when to use each of the statistical models we have worked with in this
unit. (2x2 & 2xk X2; 2BG, 2WG, kBG
& kWG ANOVA; correlation, Steiger’s
Z & Fisher’s Z)
13 Describe the different uses of Steiger’s
Z-test and Fisher’s Z-test for comparing correlations? What questions needs to
be separated from the questions answered by these tests?