Asked by negra7585 3 points Question 2 3 points Question 3 3 points Question 4 3 points Question 5 3 points Question 6 3 points Question 7 3 points Question 8 3 points Question 9 3 points Question 10 3 points Question 11 construct validity.
ecological validity.
external validity.
internal validity.
conveys information in as few words as possible.
does not make inferences about what the reader knows.
restricts the number of theoretic constructs discussed in the report.
uses shorter sentences instead of longer ones.
advocacy of a theoretical perspective.
communication of research methodology and findings.
expression of the researcher’s opinions regarding a problem area.
stimulation of follow-up studies.
apparatus
design
participants
procedure
introduction
method
procedure
results
carryover effects.
fatigue effects.
interference effects.
practice effects.
have greater external validity.
reduce confounding.
yield more realistic data.
have greater external validity and yield more realistic data.
discussion
introduction
methods
results
internal valid
practically significant
replicable
internally valid and replicable
It is harder to employ unobtrusive measures.
They have less external validity.
We cannot manipulate antecedent conditions.
We often have little or no control over who participates in the experiment.
- ____ describes the consistency of an effect across past studies and estimates average effect sizes.
Meta-analysis Multivariate analysis Power analysis Regression analysis
3 points
Question 12
- “The results of the current experiment supported the hypothesis that exposure to violent music videos would produce greater acceptance of violent behavior” belongs in the ____ section.
discussion introduction method results
3 points
Question 13
- The overall purpose of the discussion section is to
evaluate and interpret the results of your experiment. explain how you developed the research hypothesis. review prior research in the area. summarize the study.
3 points
Question 14
- When there is a statistically significant difference between two treatment groups, we know
extraneous variables did not confound the study. random assignment created groups that were identical on the dependent variable before the researcher manipulated the independent variable. the effect size of the independent variable is very large. the independent variable produced group differences on the dependent variable that are larger than we would expect due to chance.
3 points
Question 15
- When we use random assignment in an experiment, we guarantee that
every subject in our sample has an equal chance of being placed in any of the treatment conditions. every subject in the population has an equal chance of being selected for the experiment. the treatment groups are identical on potentially confounding extraneous variables. treatment order is randomized to prevent order effects.
3 points
Question 16
- A typical abstract for a research report rarely exceeds ___ words.
3 points
Question 17
- A sample’s representativeness affects
external validity statistical power internal validity the experimental design
3 points
Question 18
- A within-subjects design
controls extraneous variables better than random assignment in a between-subjects design. is less vulnerable to carryover effects than a between-subjects design. requires less time to run subjects than a between-subjects design. requires more subjects than a between-subjects design.
3 points
Question 19
- Which is a good “rule of thumb” for selecting an experimental design?
Select a design based on the number of subjects immediately available. Select a design that can detect higher-order interactions. Select the design with the lowest statistical power. Select the simplest design that will adequately test your hypothesis.
3 points
Question 20
- Since subjects in a within-subjects design participate in more than one experimental condition and are assessed on the dependent variable after each treatment, this design is also called a ____ design.
between-subjects factorial independent groups repeated-measures
3 points
Question 21
- Since Andrew only had 3 days to collect experimental data, he obtained a convenience sample of students eating lunch in the cafeteria. Nonprobability sampling worried him because of risk to his experiment’s
effect size external validity internal validity statistical power
3 points
Question 22
- Toby measured blood pressure changes in extreme Type As and extreme Type Bs who were each exposed to three levels of time pressure to complete a difficult puzzle (no time limit, 15 minutes, and 30 minutes). Which experimental design did Toby use?
independent groups matched groups mixed design multiple independent groups
3 points
Question 23
- A within-subjects design is a poor choice when
participation in one treatment condition will provide subjects too many clues about the next conditions. subjects vary widely in performance on the dependent variable. there is a small number of subjects. we need to control extraneous subject variables.
3 points
Question 24
- We should suspect contamination by ____ when performance improves as participants become more skillful using the equipment.
carryover effects. fatigue effects. interference effects. practice effects.
3 points
Question 25
- Shawn’s study manipulated music (radio or no radio) and list length (short or long), and measured word recognition. Music and list length were
conditions elements factors levels
3 points
Question 26
- Experimental designs that study two or more independent variables at the same time are called
factorial designs multiple levels designs multiple independent groups designs univariate designs
3 points
Question 27
- Which technique manipulates antecedent conditions and observes outcomes in a natural setting?
correlational study ex post facto field experiment quasi-experiment
3 points
Question 28
- Researchers can use ____ to effectively control reactivity in an experiment.
aggregation control groups cover stories unobtrustive measures
3 points
Question 29
- The most serious dilemma posed by waiting-list control conditions in medical and psychotherapy research is that
waiting-list controls deny treatment to patients who need it. waiting-list controls lack the credibility of conventional treatments. waiting-list controls possess low external validity. waiting-list controls suffer from high subject mortality.
3 points
Question 30
- ____ means that we can accurately extend experimental results to other situations.
External validity Practical significance Internal validity Research significance
3 points
Question 31
- Ashton studied the effect of wearing single-strap and double-strap backpacks on shoulder muscle contraction. He tested the same subjects in both single-strap and double-strap conditions to control individual differences in trapezius muscle activity. This study employed a ____ design.
between-subjects multiple independent groups matched groups within-subjects
3 points
Question 32
- Whenever subjects in an experiment know they are being observed, they may behave differently than others who are not observed. This problem is called
attribution experimenter bias reactivity social facilitation
3 points
Question 33
A sample's representativeness affects
external validity.
statistical power.
internal validity.
the experimental design.
Answer & Explanation
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