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Practical Significance
Practical significance refers to the real-world importance, usefulness, or meaningfulness of a research finding. Even if a result is statistically significant, it may lack practical significance if the observed effect is trivial or too weak to have any meaningful impact in everyday life or practice.
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Research Methods in Psychology - 4th American Edition @ KPU
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Probabilistic Nature of Statistics
Trade-off Between Sample Size and Relationship Strength
Practical Significance
In the context of inferential statistics, what does it mean when a research finding is described as statistically significant?
In psychological research, if a finding is described as statistically significant, it implies that the observed effect is likely to be a genuine phenomenon rather than a product of random variation.
A psychological researcher is evaluating the results of several different studies. Match each specific research scenario with the correct statistical interpretation regarding significance and the nature of the findings.
A psychologist is evaluating whether a new study on social interaction reveals a real phenomenon or just a fluke. Arrange the logical stages of the researcher's analytical process to correctly conclude that a finding is statistically significant.
Match each term related to the interpretation of research results with its correct defining characteristic.
Example of Sample Size and Relationship Strength
A researcher reports that a new study-skills training program led to a statistically significant increase in exam scores compared to a control group. What does it mean for this finding to be 'statistically significant'?
A researcher claims that a research finding is 'proven' because the probability of the results occurring by random chance alone is only . A peer reviewer evaluates this claim and suggests a more scientifically accurate term, noting that the finding should instead be described as _____ to indicate that it is highly unlikely to have occurred due to random variation while avoiding the overstatement of absolute proof.
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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.