Final answer:
Expectancy value theories assume that the actions of humans cannot be predicted without an understanding of people's expectations and values.
Step-by-step explanation:
Expectancy value theories assume that the actions of humans cannot be predicted without an understanding of people's expectations and values. These theories suggest that humans weigh the potential outcomes or rewards of their actions with their personal beliefs and attitudes. For example, if a student expects good grades to lead to future success and values academic achievement, they are more likely to study and engage in schoolwork.