Expectancy Theory and Police Productivity in DUI Enforcement

Abstract

This article drew on expectancy theory in industrial/organizational psychology to explain arrest productivity for driving under the influence (DUI) in a sample of Pennsylvania police officers. Expectancy theory is a cognitive model of motivation and performance based on workers' perceptions of their situation. Its major elements are estimated in a regression model: the officer's capability and opportunity for DUI enforcement (performance-reward expectancy), the instrumentality of DUI enforcement behavior for the officer, and the reward-cost balance associated with making DUI arrests. These factors account for 26% of the residual variance in the number of DUI arrests made annually once organizational effects have been removed. The relationships revealed are as expectancy theory predicts, except for instrumentality variables, which show a negative relationship to arrest productivity. This is due largely to the orientation of a small number of “rate busters,” whose exceptionally high arrest rate and negative attitudes toward their peers and the department hierarchy make them a distinct group accounting for a disproportionate number of arrests.