Stats Review
Experiments
Threats to Validity
APA Style
Potpourri
100
The prediction that there is no difference between your groups
What is the null hypothesis?
100
Group(s) that receives no treatment or the standard treatment
What is the control group(s)?
100
When the experimenter is aware of the study’s hypothesis and unknowingly influences the results to support the hypothesis.
What is experimenter bias?
100
p values are round to ___ decimal places
What is three?
100
When every person in the population of interest has an equal chance of being included in the study.
What is random sampling?
200

Statistical test you use when comparing two separate groups of people on the same continuous outcome measure.

What is a an independent samples T-test?

200
The two requirements for an experiment
What are a manipulation & random assignment?
200
Any natural changes to participants during your study that could affect their performance
What is maturation?
200

The section of a paper where you write your hypotheses.

What is the introduction?

200

Variables that influence the DV evenly across conditions

What is noise?

300
The agreed upon alpha level for hypothesis testing
What is .05?
300
How confident we are we confident that changes in our IV caused the changes in our DV
What is internal validity?
300
Aspects of an experiment that subtly suggest how participants should behave.
What are demand characteristics?
300
In the results section, everything except p-values should be rounded to ____ decimal places.
What is two?
300
The degree to which the physical setting in an experiment is similar to the real world settings.
What is mundane realism?
400

The correct statistical test anytime we compare the same group of people at two different time points.

What is an dependent t-test?

400
Eliminates the “what about individual differences?” problem in experiments
What is random assignment?
400
Extreme scores tend to become less extreme when measured again
What is regression towards the mean?
400

The major sections of an APA style research paper.

What are (1) Introduction (2) Method (3) Results & (4) Discussion?

400
Follow up tests to determine exactly which groups are driving the significant difference.
What are post-hoc tests?
500
Measure of effect size for t-tests.
What is Cohen's d?
500
Varies systematically with one level of the IV but NOT the other
What is a confound?
500

When the IV is only related to the DV under
a specific set of circumstances

What is an artifact?

500
The section of your paper where you interpret your findings
What is the Discussion?
500

Verbal labels included in rating scales that provide meaning to numeric values.

What are anchors?

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