In the context of the selection of participants for research, a selection-by-threat interaction effect occurs when the threats to internal validity operate similarly across treatment conditions.

Selection-By-Threat Interaction Effect

A situation in research where the selection of participants and specific threats to validity interact, affecting the experimental results.

Internal Validity

The extent to which a study effectively demonstrates a causal relationship between variables, minimizing the impact of confounding variables.

Treatment Conditions

Describes the different circumstances or interventions applied to study groups in experimental research to examine their effects on outcomes.