How is "quantitative research" defined in clinical psychology?

Quantitative research in clinical psychology is defined as a systematic investigation that primarily focuses on quantifying relationships, behaviors, and variables. This approach utilizes statistical methods and numerical data to analyze patterns, test hypotheses, and establish correlations among various psychological factors. The emphasis on quantification allows researchers to objectively measure outcomes and determine the effectiveness of interventions, making it a crucial component of evidence-based practice.

In contrast, the other options pertain to qualitative research methods, which concentrate on understanding subjective experiences, descriptions, and the complexity of human behavior through non-numerical data such as interviews or observational notes. Such methods are valuable for exploring nuanced perspectives but do not align with the core focus of quantitative research, which is centered on measurement and analysis of numerical data.