The Theory of Planned Behaviour (TPB) offers a robust framework for understanding the factors that influence individuals' intentions and subsequent behaviours, particularly in health-related contexts. This is particularly relevant when examining the low uptake of HIV testing among university students, despite general awareness of its importance. By applying TPB, we can identify key constructs that shape students' intentions to seek HIV testing and develop targeted strategies to increase both intention and actual testing.

TPB posits that intention is the immediate determinant of behaviour. Three key constructs influence this intention: attitude, subjective norm, and perceived behavioural control. Attitude refers to an individual's positive or negative evaluation of performing a behaviour. In the context of HIV testing, students who view testing as beneficial, convenient, and low-risk are more likely to intend to get tested. Research consistently shows that positive attitudes towards HIV testing correlate with higher intention to seek testing. For instance, studies have found that students who believe HIV testing is a responsible health practice are more likely to schedule appointments.

Subjective norm, the second TPB construct, pertains to an individual's perception of social pressure to perform or not perform a behaviour. This includes the influence of peers, family, and societal expectations. Among university students, subjective norms play a significant role. If students perceive that their peers and social circles support HIV testing, they are more likely to intend to get tested. Conversely, if they believe that their social group views testing negatively or as unnecessary, their intention to test may decrease. Interventions that highlight the normativity of HIV testing, such as social media campaigns featuring peer influencers, can be particularly effective in shaping subjective norms.

Perceived behavioural control, the third TPB construct, refers to an individual's belief in their ability to perform a behaviour. This includes both internal factors, such as self-efficacy, and external factors, such as accessibility and convenience. Among university students, perceived barriers such as lack of time, cost, and stigma significantly hinder testing uptake. For example, some students may feel that they cannot afford the time or financial cost of HIV testing, or they may fear the social stigma associated with testing positive. Increasing accessibility, such as offering on-campus testing services or reducing costs, can enhance perceived behavioural control and, consequently, intention to test.

While TPB provides a comprehensive framework, views differ on the relative effectiveness of interventions targeting intentions versus attitudes or norms. Some argue that changing attitudes is more impactful in the long term, as it fosters a deeper understanding of the benefits of HIV testing. Others suggest that targeting subjective norms and perceived behavioural control may yield more immediate results, as these constructs address practical barriers and social influences. Additionally, the percentage of individuals who intend to get tested and actually do so varies widely, with some studies suggesting a significant gap between intention and behaviour. This discrepancy highlights the need for interventions that not only foster intention but also address practical barriers to testing.

Increasing HIV testing uptake among university students requires a multifaceted approach that targets all three TPB constructs. Education and awareness campaigns can improve attitudes and subjective norms by providing accurate information about the importance and benefits of HIV testing. For example, workshops and seminars led by healthcare professionals can address misconceptions and highlight the positive aspects of testing. Similarly, peer-led education campaigns, where students educate their peers, can create a sense of social accountability and normativity around testing. Some argue that peer-led campaigns are particularly effective, as they leverage existing social networks and trust among students.

To enhance perceived behavioural control, interventions should focus on increasing accessibility and reducing barriers. Offering free or low-cost testing services on campus can address financial concerns, while flexible scheduling can accommodate students' busy academic schedules. Additionally, efforts to reduce stigma through open dialogue and supportive environments can make students feel more comfortable seeking testing. For instance, universities can implement anonymous testing services or create support groups for students who test positive.

In conclusion, the Theory of Planned Behaviour provides a valuable framework for understanding the factors that influence university students' intention to seek HIV testing. By addressing attitudes, subjective norms, and perceived behavioural control, targeted interventions can effectively increase both intention and actual testing uptake. A comprehensive approach that integrates education, peer influence, and practical support is essential for fostering a culture of regular HIV testing among university students.