The sociocultural perspective explains the influence of social media on teenage behavior by emphasizing how cultural norms, values, and technologies shape individual behaviors and interactions. This perspective would highlight how social media creates new social norms and expectations, such as the need for online popularity and the influence of 'influencers' on teenagers' attitudes and behaviors. It would also consider how social media platforms facilitate social comparison, peer influence, and the sharing of cultural trends, impacting teenagers' self-esteem, body image, and social behaviors. Additionally, this perspective acknowledges the role of cultural differences in how teenagers interact with social media; for example, the varying ways teenagers from different cultures might use and be influenced by social media platforms. By understanding these sociocultural dynamics, we gain insight into the complex relationship between social media and teenage behavior.

The evolutionary perspective can be used to understand romantic attraction and partner selection by examining how these behaviors may have been shaped by evolutionary processes to enhance reproductive success and survival. From this viewpoint, certain traits in a potential partner, such as physical attractiveness, health, or resources, are seen as indicators of good genes or the ability to provide for offspring. For example, physical attractiveness might be interpreted as a sign of health and fertility, while resources and status may be viewed as indicators of the ability to provide and protect. Evolutionary psychologists also study how preferences for certain traits may vary depending on cultural and environmental factors but generally focus on how these preferences contribute to reproductive and survival advantages. This perspective provides a biological basis for understanding complex social behaviors like romantic attraction and partner selection.

The biological perspective contributes significantly to our understanding of stress and its impact on the body by examining physiological responses and changes within the body systems. When an individual perceives a threat or stressor, the body activates the "fight or flight" response, which involves the sympathetic nervous system and the release of stress hormones like cortisol and adrenaline. These hormones increase heart rate, blood pressure, and glucose levels, preparing the body to respond to the stressor. Prolonged exposure to stress can lead to chronic activation of this response, potentially causing health issues such as hypertension, weakened immune system, and increased risk of cardiovascular diseases. Additionally, the biological perspective explores how genetics and brain structures influence an individual's susceptibility to stress and their coping mechanisms. This perspective is crucial in understanding the relationship between stress and physical health, leading to better stress management strategies and treatments.

The humanistic perspective plays a significant role in understanding adolescent identity development by focusing on the individual's subjective experience and the quest for self-actualization. This perspective views adolescents as inherently good and capable of growth, emphasizing the importance of self-awareness and personal growth in forming their identity. According to humanistic psychologists, factors such as unconditional positive regard from parents and caregivers, the freedom to explore one's potential, and the opportunity for self-expression are crucial for healthy identity development. This approach suggests that adolescents develop a sense of self and identity when they feel valued, understood, and given the freedom to explore their interests and values. It underscores the importance of supportive environments that nurture an adolescent's self-exploration and personal growth, ultimately leading to a stronger and more coherent sense of identity.

The cognitive perspective can be applied to understand student procrastination by examining how thought processes, beliefs, and problem-solving strategies influence this behavior. Cognitive psychologists would look at how a student's perception of a task, such as viewing it as daunting or uninteresting, contributes to procrastination. They might explore the role of self-efficacy beliefs, where a lack of confidence in one's abilities leads to delaying tasks. Cognitive distortions, such as overgeneralization or catastrophic thinking ("If I don't do well, it's a disaster"), can also play a part. By understanding these cognitive patterns, interventions can be designed to change these thought processes, such as teaching time management skills, fostering positive attitudes towards tasks, and developing realistic goal-setting techniques. The cognitive approach emphasizes the need to address internal mental processes to alter behaviors like procrastination.