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Alternative Theories Explaining the Same Hypothesis
Empirically confirming a hypothesis can strengthen a scientific theory, but it cannot definitively prove the theory to be true. One major reason for this limitation is that multiple plausible theories might logically imply the exact same hypothesis. When such a hypothesis is confirmed by empirical data, it provides evidence that strengthens all of those alternative theories equally, making it impossible to determine which specific theory is the correct one based on that single test.
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Research Methods in Psychology - 4th American Edition @ KPU
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Impossibility of Proving a Theory
Alternative Theories Explaining the Same Hypothesis
What do researchers conclude when a systematic empirical study yields statistically significant results that are consistent with the hypothesis?
Arrange the logical steps a researcher takes to provide empirical support for a scientific theory in psychology.
A team of researchers is evaluating whether their latest study results provide empirical support for their respective theories. Match each researcher's outcome with the correct conclusion regarding the status of their theory.
A researcher investigating cognitive dissonance finds that their experimental data align with their hypothesis, but the results fail to achieve statistical significance. True or False: This outcome allows the researcher to conclude that the underlying theory is supported because the theory successfully accounted for the observed direction of the results.
When a systematic empirical study yields statistically significant results that are consistent with the hypothesis, the underlying theory's validity is strengthened because it has made an accurate prediction.
In psychological research, what does it mean when a researcher concludes that a scientific theory is 'supported' by the results of an empirical study?
A researcher is evaluating whether a systematic study provides sufficient grounds to conclude that a theory's validity has been strengthened. Even if the data aligns with the theory's predictions, the researcher must judge the theory to be _____ if the results fail to achieve statistical significance.
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Impossibility of Proving a Theory
What is a major reason why empirically confirming a hypothesis cannot definitively prove a specific scientific theory to be true?
In psychological research, if two different theories both lead to the same testable hypothesis, finding empirical evidence that supports that hypothesis will strengthen both theories equally.
A researcher investigates why people are more helpful when in a good mood. Theory A suggests people help to maintain their positive state, while Theory B suggests people help because a good mood makes them feel more optimistic about others. Both theories predict that participants given a free cookie will help a stranger more than those given nothing. A study confirms this prediction. Match the elements of this research scenario to the logical principles of theory testing.
A psychologist is evaluating two different theories of social behavior. Theory A suggests people conform to fit in, while Theory B suggests people conform to be correct. Both theories predict that a participant will agree with a group's wrong answer in a specific experiment. Arrange the logical steps that explain why an empirical confirmation of this behavior fails to prove which theory is correct.
According to the logic of theory testing, when an empirical test confirms a hypothesis that is predicted by multiple competing theories, how does that result affect the alternative theories?
Dr. Chen studies academic motivation. Theory 1 holds that students who set specific goals earn higher grades because goal-setting activates self-regulation. Theory 2 holds that students who set specific goals earn higher grades because stated goals prompt teachers to provide extra support. Both theories predict the same hypothesis: students who set specific academic goals will outperform students who do not on final course grades. Dr. Chen runs a study confirming this hypothesis and concludes that her results prove Theory 1 is the correct explanation for the effect.
Is Dr. Chen's conclusion logically sound?
A research team is evaluating three candidate theories of test anxiety, all of which predict the same hypothesis: students high in trait anxiety will score lower on timed exams than students low in trait anxiety. Match each research situation on the left with the methodological or logical implication it best illustrates on the right.
Maya, a psychology graduate student, wants to evaluate whether her study's results validate her preferred theory of implicit bias over a competing theory. Both theories predict the same pattern of reaction-time differences on an implicit association task. Arrange the following steps in the order that reflects the most logically rigorous evaluation process Maya should follow.
A researcher is evaluating two distinct theories that both predict that a specific drug will improve cognitive focus. If an experiment confirms this improvement, the researcher must judge the resulting evidence as _____ for determining which underlying theoretical mechanism is responsible for the effect.
If two distinct psychological models both predict the exact same behavior, and a study successfully observes that behavior, the results cannot identify which model is correct because the confirmed data supports both alternative models _____.
Explain why empirically confirming a hypothesis does not definitively prove a scientific theory to be true, particularly when alternative theories exist. In your explanation, describe how the confirmed hypothesis affects these alternative theories.
Diagnose the limitation of this finding in distinguishing between the two theories. Why is the researcher unable to claim that Theory 1 is the correct explanation for the observed results?
A researcher is evaluating two competing theories that both predict that practicing mindfulness will reduce physiological stress. An experiment confirms that mindfulness practice does reduce stress. Apply the logic of theory testing to determine how this result affects the status of both theories.