Criticisms of Null Hypothesis Testing
Null hypothesis testing is subject to several major criticisms, including frequent misunderstandings of results by researchers, the arbitrary nature of the rigid significance threshold, and the argument that rejecting the null hypothesis provides very little information about the actual relationship between variables in a population.
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Research Methods in Psychology - 4th American Edition @ KPU
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Criticisms of Null Hypothesis Testing
In psychological research, a finding is typically considered 'statistically significant' if the probability that the observed difference occurred by random chance is:
According to the standard criteria in psychology research, a result with a 10% probability of occurring by random chance would be classified as statistically significant.
A team of researchers has completed four separate psychological studies. Match each study's calculated p-value to the correct interpretation of its statistical significance based on the standard 5% threshold.
A researcher is evaluating the strength of evidence provided by four separate studies. Arrange these findings in order from the highest level of confidence to the lowest level of confidence that the observed result represents a meaningful effect rather than random chance, based on the standard threshold for statistical significance in psychology.
Match each term related to the standard of statistical significance in psychology with its correct description according to the course definition.
In psychological research, what does it mean to conclude that a finding is 'statistically significant' at the standard level?
A researcher finds that a treatment group performed better than a control group, with a probability of that the result was due to random chance. Since this meets the standard threshold for significance, the researcher concludes that the findings are _____ rather than a fluke.
t-Test
Outcomes of a Null Hypothesis Test
Informativeness of Null Hypothesis Testing
Defense of Null Hypothesis Testing
The 2015 Ban on Null Hypothesis Testing
Effect Size
Confidence Interval
Criticisms of Null Hypothesis Testing
Mehl's Study on Talkativeness
Kanner's Study on Hassles and Symptoms
Logic of Null Hypothesis Testing
What is the primary purpose of null hypothesis testing in psychological research?
If a researcher wants to evaluate whether an observed difference between two sample groups is just a coincidence rather than a real effect, they would use null hypothesis testing.
A social psychologist is investigating the 'Bystander Effect' to see if the presence of others reduces the speed of helping. Arrange the logical steps of the Null Hypothesis Testing process in the correct order as they would be applied to this specific research scenario.
In psychological research, null hypothesis testing requires researchers to distinguish between initial assumptions, mathematical thresholds, and formal conclusions about the population. Match each term with its specific logical interpretation within this framework.
Reject the Null Hypothesis
-Test
In the field of psychological research, null hypothesis testing is recognized as the most common approach to which branch of statistics?
Null hypothesis testing involves several interconnected concepts and decision points. Match each term with the statement that best describes its role in the null hypothesis testing process.
In the formal process of null hypothesis testing, a researcher evaluates the probability () that an observed result occurred by random chance. If this probability is lower than the significance threshold (), the researcher makes the final evaluative judgment to _____ the null hypothesis.
Dr. Smith conducts an experiment on a sample of participants and finds that those who receive a new cognitive training show higher memory scores than those who do not. To evaluate whether this observed difference is likely just a fluke of random chance or if it reflects a genuine difference in the broader population, Dr. Smith should use null hypothesis testing.
Null hypothesis testing is the most common approach to _____ statistics in psychological research, serving as a structured process to decide between random chance and genuine population relationships.
Arrange the steps a researcher takes when using null hypothesis testing to evaluate a research outcome, from the initial conceptual setup to the final population-level judgment.
Learn After
Misinterpreting p-values as the Probability of the Null Hypothesis
Abelson's Defense of Null Hypothesis Testing
Which of the following is considered a major criticism of null hypothesis testing?
Match each major criticism of null hypothesis testing (NHST) with the explanation of why it limits the interpretation of psychological data.
A researcher conducts a study on the effects of a new study technique and obtains a p-value of 0.055. They conclude that the technique has no effect because the result was not 'statistically significant' at the 0.05 level. This researcher's conclusion directly reflects the criticism that null hypothesis testing relies on an arbitrary significance threshold.
Arrange the following steps to logically analyze how the use of a rigid significance threshold in null hypothesis testing can lead a researcher to overlook potentially important scientific insights.
One of the major criticisms of null hypothesis testing is that rejecting the null hypothesis provides very little information about the actual relationship between variables in a population.
Limited Informativeness of Rejecting the Null Hypothesis
The 2015 Ban on p-values in Basic and Applied Social Psychology
Arbitrary Nature of the 0.05 Significance Threshold
Misinterpreting p-values as the Probability of Replication
Why is rejecting the null hypothesis in psychological research criticized for providing very little information about the actual relationship between variables?
A researcher concludes that a treatment is entirely ineffective because the results yielded a -value of . A colleague evaluating this conclusion would point out that the researcher is relying on a(n) _____ significance threshold that treats nearly identical statistical evidence as categorically different.
A researcher is applying their knowledge of null hypothesis testing (NHST) criticisms to evaluate common errors in published studies. Match each research scenario on the left to the specific criticism of NHST it best illustrates on the right.
Critics who argue that null hypothesis testing is 'not very informative' are pointing out that a statistically significant result (e.g., p < 0.05) tells a researcher only that the null hypothesis can be rejected, but does not reveal the _____ of the relationship between variables — which is essential for understanding what the finding actually means in the population.
A peer reviewer is evaluating whether a psychology paper adequately addresses the major criticisms of null hypothesis testing (NHST). Arrange the following evaluative steps in the order a thorough reviewer should perform them, from first to last.
Null hypothesis testing is widely used in psychological research but is subject to several major criticisms. Identify and state the three primary criticisms of null hypothesis testing that limit its usefulness in psychological science.
Based on the criticisms of null hypothesis testing, diagnose how Dr. Vance's conclusions show a misunderstanding of her results and explain why her reliance on rejecting the null hypothesis fails to provide key information about the variables in the population.
A developmental psychologist evaluates a new cognitive training program and finds a -value of . Because the result is above the standard cutoff, the psychologist concludes that the training program has no effect and stops the research. Apply the criticisms of null hypothesis testing to explain the flaw in the psychologist's decision-making process.