On the scope of scientific hypotheses

Area of Science:

• Metascience
• Scientific Methodology
• Research Design

Background:

• Hypotheses are foundational to the empirical scientific process, guiding data collection and analysis.
• Metascience emphasizes preregistration of hypotheses, but their formulation lacks detailed guidance.
• Current practices offer limited frameworks for constructing specific and testable scientific hypotheses.

Purpose of the Study:

• To propose a framework for formulating scientific hypotheses based on their scope.
• To define three independent dimensions of hypothesis scope: relationship, variables, and pipeline.
• To demonstrate how controlling hypothesis scope enhances novelty and guides research direction.

Main Methods:

• Conceptual analysis of hypothesis formulation in scientific research.
• Development of a multi-dimensional framework for assessing hypothesis scope.
• Exploration of the relationship between hypothesis scope and research novelty.

Main Results:

• Hypotheses vary in specificity along three dimensions: relationship, variables, and pipeline.
• Narrowing the scope in any dimension reduces the hypothesis space, increasing novelty.
• A balanced scope (neither too broad nor too narrow) is crucial for effective hypothesis testing.

Conclusions:

• The proposed framework clarifies hypothesis formulation by defining scope.
• This approach aids researchers in clearly articulating what is being tested.
• It facilitates linking new findings to existing knowledge and demarcating explicit tests.