Replication Crisis in Science

Impact of Replication Outcomes on Scientific Findings

A research team publishes a novel study concluding that a specific 5-minute daily puzzle-solving activity dramatically enhances creative problem-solving skills in adults. The study receives significant media attention. From a scientific standpoint, what is the most important reason for an independent lab to perform a similar study?

A research team finds that a specific mindfulness exercise significantly improves focus in a sample of high school students. Before the scientific community accepts this as a robust finding, other independent researchers repeat the same study using new samples of participants. Which of the following best explains the primary scientific purpose of this process?

Match each psychology research scenario involving an attempt to repeat a study with the most appropriate scientific conclusion regarding the original finding.

Arrange the following research scenarios based on the degree to which they minimize the likelihood that a significant finding is a statistical artifact rather than a genuine phenomenon, from the least protection against error (1) to the most protection against error (3).

A researcher is making a scientifically sound judgment when they conclude that a single study with a statistically significant result ($p < .05$) provides definitive evidence of a real-world effect, rendering further replication unnecessary.

A researcher publishes a study finding that students who listened to a 'nature sounds' recording for 10 minutes increased their scores on a creativity test ($p = .042$; $N = 16$). You are tasked with constructing a multi-phase research program to determine if this finding is a genuine phenomenon or a statistical artifact. Which of the following plans represents the most scientifically robust synthesis of replication principles?

In psychological research, conducting a replication of a study involves repeating the experiment using the exact same sample of participants as the original study.

In psychological research, the practice of repeating another scientist's experiment, often with new samples, to assess whether the original findings are reliable is called _____.

Match each research scenario with the concept or scientific risk it demonstrates according to the principles of replication and statistical error.

If a researcher conducts an isolated study and finds a significant effect, but multiple subsequent replication attempts with new samples fail to produce the same outcome, the original finding was likely a _____ rather than a genuine, real-world phenomenon.

Order the following scientific scenarios based on the level of confidence a researcher should have that the finding represents a genuine, real-world phenomenon (from lowest confidence to highest confidence).

In psychological research, what does it mean to replicate a study?

A single psychological experiment that yields positive results provides enough certainty to confirm a real-world phenomenon, making it unnecessary for other researchers to repeat the study.

Match each research scenario to the methodological concept it best illustrates.

A research team is investigating an isolated study that claimed a specific auditory tone improves deep sleep. The team wants to analyze whether this result is a genuine phenomenon or merely a statistical artifact. Arrange the following steps in the logical sequence that demonstrates how the scientific community uses replication to establish the reliability of a claim.

As a peer reviewer evaluating a manuscript that claims a highly surprising psychological effect based on a single experiment, you critique the authors' conclusion that their finding is definitive. You argue that to rule out a Type I error, the scientific community must wait for independent ____ before confidently accepting the result as a genuine phenomenon.

According to the principles of psychological research, why is it necessary to replicate studies rather than accepting a single isolated result as fact?

How does the replication of a study help researchers distinguish between a genuine phenomenon and a statistical artifact in psychology?

Dr. Miller reads an isolated study claiming that a new memory game improves vocabulary recall in toddlers. To assess the reliability of this finding, Dr. Miller recalculates the original study's statistics and confirms that no mathematical errors were made. This action is considered a successful replication of the study.

Analyze the following research scenarios involving replication attempts and match each to the most appropriate methodological conclusion regarding the original study's findings.

You are serving on a university committee reviewing a proposal to implement a costly new student-studying program. The proponents cite a single, newly published psychological experiment demonstrating that the program significantly improves memory retention. As a research methodologist, you must evaluate the strength of this evidence to advise the committee. Based on the principles of replication, which of the following is the most scientifically sound evaluation of the proposal?

Expansions in Replication Studies

What is the primary purpose of replicating a study in psychological research?

If an initial psychological experiment produces a significant result, researchers can confidently assume the finding represents a real-world phenomenon without needing to repeat the study.

Arrange the following events in the correct chronological order to demonstrate how a researcher applies the process of replication to build confidence in a new psychological claim.

Analyze the following research scenarios. Match each scenario with the methodological conclusion it best supports regarding the reliability of the findings.

You are an educational psychologist evaluating two new learning methods to recommend for a school district. Method A is supported by a single, isolated experiment with highly promising results. Method B is supported by an original study that has since undergone successful replication by multiple independent researchers. Because any single study carries a risk of reflecting a Type I error or statistical artifact, you judge that Method ____ (enter A or B) provides greater confidence that the underlying finding is a genuine, real-world phenomenon.

In psychological research, ____ involves repeating another scientist's experiment, often using new samples, to assess the reliability of the original findings.

A research team conducts an experiment and finds a statistically significant link between a new study technique and exam scores. However, the researchers emphasize the need for other scientists to repeat their experiment using different groups of students. Based on the principles of replication, why is this subsequent step necessary?

After reading a newly published experiment demonstrating that a specific 10-minute writing exercise reduces test anxiety, Professor Lee applies the principle of replication by designing a completely different experiment to see if a 30-minute physical workout produces the same anxiety-reducing effect.

Analyze the relationship between research replication and scientific certainty. Arrange the following research scenarios in order from the highest risk of reflecting a statistical artifact (least confidence) to the strongest evidence of a genuine, real-world phenomenon (greatest confidence).

Evaluate the following research scenarios based on the principles of replication in psychology. Match each scenario with the most appropriate methodological judgment regarding the reliability of its findings.