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Statistical Significance Versus Practical Significance
A result's statistical significance indicates that an effect is unlikely to be caused by random chance, whereas its practical significance measures its actual importance or usefulness in a real-world context. Because large sample sizes can make even very weak effects statistically significant, researchers must independently evaluate whether those findings hold any practical value.
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Research Methods in Psychology - 4th American Edition @ KPU
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Statistical Significance Versus Practical Significance
What does the term 'practical significance' refer to in the context of research findings?
A clinical study finds that a new therapy reduces anxiety scores by 0.1 points on a 100-point scale. Even if the researchers are mathematically certain that this reduction is a real effect and not a fluke, the finding would likely be described as lacking practical significance.
In psychological research, a result can be statistically significant without having real-world importance. Match each research outcome with the label that best characterizes its practical significance based on the meaningfulness of the effect.
Arrange the logical steps a researcher must follow to analyze whether a mathematically reliable finding also possesses practical significance for a real-world psychological intervention.
A clinical psychologist is designing a study for a new treatment for Social Anxiety Disorder. To ensure that any successful result possesses practical significance, which of the following evaluation frameworks should the psychologist construct as part of the study design?
Example of Lacking Practical Significance
Clinical Significance
In psychological research, a finding that is statistically significant guarantees that the result also possesses practical significance in everyday life.
A study of students finds that a new teaching method improves test scores by an average of points on a -point scale, a result that is statistically significant (). A school board reviews this finding and decides not to adopt the method, reasoning that a gain this small would have no meaningful impact on student success. The board is concluding that the finding lacks _____.
Match each hypothetical research outcome with the description that best characterizes its significance based on the relationship between mathematical reliability and real-world utility.
A researcher finds a statistically significant difference in memory recall between two groups, but the actual difference is only points on a -point scale. Although mathematically reliable, this finding is considered to lack _____ significance because the observed effect is too trivial to have any meaningful impact in everyday life.
Order the steps a researcher takes when evaluating a research finding to determine if its statistical significance translates to practical significance.
Learn After
A researcher conducts a study with 100,000 participants and finds that a new study habit improves exam scores by an average of 0.1 points out of 100. This result is statistically significant at p < .001. Which of the following best describes the relationship between the statistical and practical significance of this finding?
A team of researchers is reviewing different study outcomes. Match each specific research scenario or evaluation to the type of significance it best illustrates based on the provided details.
A researcher conducts a study on 100,000 students and finds that a new mnemonic strategy improves memory recall by 2%. Arrange the following steps in the logical analytical sequence a researcher must follow to determine if the findings should be implemented in schools, moving from initial probability testing to final utility assessment.
In psychological research, it is a sound evaluative judgment to conclude that a finding is practically significant solely because it has reached statistical significance () in a study with a very large sample size.
A psychologist is designing a research protocol to evaluate a digital intervention for social anxiety using a massive sample of . To ensure the study results are interpreted with both statistical and practical significance in mind, which comprehensive reporting framework should the psychologist construct?
In psychological research, statistical significance measures the actual real-world importance or usefulness of a study's finding, while practical significance indicates whether the finding is unlikely to be caused by random chance.
When a researcher finds that a result is unlikely to have occurred by random chance alone, this indicates statistical significance. However, to determine whether the finding has real-world importance or usefulness, the researcher must also evaluate its _____ significance.