A researcher conducts a study on a new cognitive training app and finds a statistically significant relationship between app usage and working memory performance (). Applying the criticism regarding the limited informativeness of rejecting the null hypothesis, explain why this result alone is insufficient for evaluating the app's real-world utility and how the researcher should improve their reporting.
Question: A researcher conducts a study on a new cognitive training app and finds a statistically significant relationship between app usage and working memory performance (). Applying the criticism regarding the limited informativeness of rejecting the null hypothesis, explain why this result alone is insufficient for evaluating the app's real-world utility and how the researcher should improve their reporting.
Sample answer: Simply rejecting the null hypothesis () only indicates that the relationship between app usage and working memory is nonzero. However, it does not describe the actual magnitude (effect size) of this relationship, which is crucial for determining its practical significance. Additionally, since real-world relationships are rarely exactly zero, rejecting the null hypothesis may merely confirm a trivial difference. To make this finding informative, the researcher must report a measure of effect size (e.g., Cohen's or Pearson's ) to indicate the strength and practical importance of the effect.
Key points:
- Rejecting the null hypothesis only indicates the relationship is nonzero.
- The test fails to describe the actual magnitude or practical significance of the effect.
- Population relationships are rarely exactly zero, making null rejection trivial on its own.
- Researchers must report effect sizes (e.g., Cohen's or Pearson's ) to resolve this limitation.
Rubric: A complete answer must: 1. Correctly apply the criticism that rejecting the null hypothesis only asserts a nonzero relationship. 2. Explain that the result does not describe the magnitude or effect size. 3. Note that population relationships are rarely exactly zero. 4. Propose reporting effect sizes (e.g., Cohen's or Pearson's ) to provide the missing magnitude information.
0
1
Tags
KPU
Research Methods in Psychology - 4th American Edition @ KPU
Related
Which of the following describes a major criticism regarding the informativeness of rejecting a null hypothesis?
Critics of traditional significance testing argue that rejecting a null hypothesis is highly informative because it provides precise details about the magnitude of the relationship between variables in a population.
A team of psychologists is evaluating a new mindfulness program for reducing stress. Match each research outcome to the specific criticism regarding the informativeness of null hypothesis significance testing (NHST) it illustrates.
A researcher conducts a study on the relationship between sleep quality and word recall with 100,000 participants and finds a 'statistically significant' result (p < .05). Arrange the following steps to reconstruct the logical argument explaining why this rejection of the null hypothesis provides limited information.
You are tasked with creating a new research protocol intended to ensure that experimental findings are truly informative and address the criticism that simply rejecting a null hypothesis provides limited insight. Which of the following strategies should you create and implement to provide information about the magnitude of a relationship rather than just its existence?
Critics of Null Hypothesis Significance Testing (NHST) argue that simply rejecting the null hypothesis is often uninformative. Arrange the following steps to represent the logical flow of this criticism, beginning with the initial assumption about the population and ending with the limitation of the research finding.
According to critics of null hypothesis testing, what is the primary reason that simply rejecting a null hypothesis is often considered uninformative?
A researcher conducts a study and successfully rejects the null hypothesis, concluding that there is a statistically significant relationship between sleep duration and test performance. Based solely on this rejection, the researcher can determine how large or practically important this relationship actually is.
Suppose you are designing a new 'Best Practices' template for psychology researchers to ensure their findings provide meaningful insight beyond a simple 'nonzero' assertion. Which of the following reporting protocols would you construct to address the criticism that rejecting a null hypothesis is often uninformative?
A researcher rejects the null hypothesis in a study on a new mindfulness app (). Match the following scenarios to the specific reason critics would find this result 'uninformative' according to the limitations of null hypothesis testing.
A researcher presents a finding as a major discovery based solely on a rejected null hypothesis (). A critic evaluating this claim would argue that the result has limited _____ because it merely confirms that a relationship is not exactly zero—a condition that is likely already true in the population—without providing a meaningful estimate of the actual magnitude of the effect.
When evaluating the scientific utility of a research finding that only reports the rejection of a null hypothesis (), critics argue the result is limited in its informativeness because it merely confirms that a relationship is 'nonzero' while failing to specify the _____ of the relationship required to judge its actual importance.
A researcher conducts a study on a new cognitive training app and finds a statistically significant relationship between app usage and working memory performance (). Applying the criticism regarding the limited informativeness of rejecting the null hypothesis, explain why this result alone is insufficient for evaluating the app's real-world utility and how the researcher should improve their reporting.
Analyze Dr. Vance's conclusion using the 'limited informativeness of rejecting the null hypothesis' critique. Diagnose the issue with her justification and explain why her large sample size makes this finding particularly susceptible to this criticism.
A peer reviewer evaluates a manuscript where the authors conclude: 'Because our study successfully rejected the null hypothesis (), we have provided strong and informative evidence that our intervention has a meaningful impact.' Evaluate this claim using the arguments against the informativeness of null hypothesis testing.