Imagine you're a researcher studying how sleep affects mood. To explore the connection, you would look at two key "variables": sleep (how much someone gets) and mood (how happy or irritable they feel) ...

Previous research has shown a fairly consistent relationship between religion and/ or religiosity and attitudes towards abortion. Data from a 1972 national sample is presented showing the importance ...

International regimes are defined as principles, norms, rules, and decision making procedures around which actor expectations converge in a given issue-area. As a starting point, regimes have been ...

The simple correlation matrix in Table 2 revealed highly significant intercorrelations between all relevant study variables without exception, providing evidence for an unadjusted association between ...

The intervention can be a one-time event. For example, you might want to study the effect of a short-term advertising campaign on the sales of a product. In this case, the input variable has the value ...