A hypothesis is a tentative statement that predicts the relationship between two or more variables. It serves as a guide for data collection, analysis, and interpretation in social work research. A well-formulated hypothesis helps the researcher focus on the problem, identify relevant variables, and test assumptions scientifically. In social work, hypotheses are developed from theories, observations, previous studies, or practical experiences with individuals, groups, and communities. The three common forms of hypothesis are the research hypothesis, the null hypothesis, and the alternative hypothesis. The research hypothesis, also known as the substantive or working hypothesis, is a statement that predicts the expected relationship between variables. It expresses what the researcher believes to be true based on theory or prior knowledge. This hypothesis may indicate a positive, negative, or causal relationship. It provides direction to the study and helps determine the research design and methods of analysis. For example, a social worker wants to study whether participation in life-skills