The delayed phase preference suggests that school should:

The delayed phase preference suggests that school should:

• A. Be held in the afternoon and evening.
• B. Be held year-round.
• C. Begin later in the morning.
• D. Begin earlier in the morning.

Answer: (C)

The delayed phase preference refers to a common phenomenon in adolescents, where their natural sleep-wake cycle shifts, resulting in a preference for staying up later and waking up later. This shift is due to biological changes that occur during puberty, affecting the body's internal clock.

Starting school later in the morning aligns better with this natural sleep pattern. Studies have shown that when schools begin later, students are able to get more sleep, which can significantly enhance their academic performance, mental health, and overall well-being. Later start times allow adolescents to engage more effectively in learning, as they are more alert and attentive during morning classes compared to an early start, which can lead to sleep deprivation.

In contrast, if school starts too early, it can exacerbate sleep deficits, leading to negative outcomes such as decreased concentration, increased absenteeism, and poorer academic results. This understanding is supported by research advocating for later school start times, making the recommendation to begin later in the morning particularly sound in light of adolescent developmental needs.