Example of Practical or Ethical Constraints Requiring Non-Experimental Research: Hippocampus Damage

Under what condition is a researcher required to use a non-experimental design to investigate a potential causal relationship?

In psychological research, certain barriers prevent researchers from using experimental methods even when investigating causal questions. Match each description with the concept that explains why or how a non-experimental design is used.

A researcher wants to study the long-term effects of heavy alcohol consumption during pregnancy on a child's cognitive development. Because it is unethical to deliberately assign pregnant women to drink alcohol for research purposes, the researcher must use a non-experimental design to compare children whose mothers chose to drink with those who did not.

A researcher is investigating whether long-term social isolation causes cognitive decline in the elderly. Arrange the steps of the researcher's analysis to determine why a non-experimental design must be used for this causal investigation.

When practical or ethical barriers prevent the manipulation of an independent variable, researchers must rely on the observation of pre-existing, naturally occurring differences.

In a scenario where a researcher wishes to study a causal relationship but finds that manipulating the independent variable is prohibited by ethical standards, what characterizes the resulting non-experimental approach?

In evaluating the design for a study on the long-term cognitive effects of witnessing domestic violence in childhood, a researcher concludes that a non-experimental design is the only viable option. This decision is based on the assessment that the _____ of the independent variable is prohibited by ethical standards, making a true experiment impossible.

Match each hypothetical research scenario with the appropriate methodological concept or constraint based on the conditions for non-experimental research.

A researcher is studying the potential causal relationship between localized brain damage and memory loss. Because they cannot ethically damage participants' brains, they must analyze this phenomenon by relying on the observation of _____ differences.

Evaluate the research scenario of investigating whether childhood lead exposure causes learning disabilities, and order the steps the researcher must take to justify and implement a non-experimental design.