A purposive incentive to join an interest group is based on an individual’s belief in the interest group’s:
organizational resources
ideology
economic inducements
social community
The correct answer and explanation is :
The correct answer is ideology.
Explanation:
A purposive incentive is an incentive that draws people to join an interest group based on shared beliefs or ideologies. This type of incentive is intrinsic and is driven by an individual’s values, principles, and worldview. The person is motivated to participate in the group because they agree with its goals or support the cause it stands for, such as promoting environmental protection, advocating for civil rights, or supporting economic policies.
Interest groups that appeal to people’s ideology often focus on political, social, or moral issues where individuals feel a deep connection. For example, a person who believes strongly in environmental conservation may join an environmental interest group like Greenpeace, motivated by their shared belief in the importance of protecting nature. The desire to support causes that align with one’s values serves as the core incentive in these types of groups.
On the other hand, other incentives such as organizational resources, economic inducements, and social community may also attract individuals to interest groups, but they function differently:
- Organizational resources refer to the physical or financial resources that an interest group can provide to its members, like access to information, networking opportunities, or legal assistance. These are not directly tied to an individual’s personal beliefs or ideology.
- Economic inducements are material incentives that provide tangible benefits, such as discounts, services, or job-related perks. These incentives often appeal to individuals looking for personal or professional advantages rather than ideological alignment.
- Social community refers to the social connections and relationships individuals might form by joining an interest group, such as a sense of belonging to a like-minded group of people. While this can be an attractive factor, it is still secondary to the ideological drive in purposive incentives.
Ultimately, a purposive incentive is rooted in the belief that being part of the interest group will contribute to achieving a shared ideological goal.

Here is an image that visually represents the different types of incentives for joining an interest group, including the ideological incentive, which is the most relevant to the question.