Which of the following factors have been linked to infant sleep problems?

• A. Consistent bedtime routines
• B. High socioeconomic status
• C. Exclusive breastfeeding
• D. Parental depression

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the context of infant sleep problems by reviewing psychological research on factors influencing infant sleep patterns.
2. Step 2: Identify common factors that have been studied in relation to infant sleep, such as bedtime routines, socioeconomic status, feeding methods, and parental mental health.
3. Step 3: Recognize that consistent bedtime routines are generally associated with better sleep outcomes, not problems, so this factor is unlikely to be linked to sleep problems.
4. Step 4: Consider that high socioeconomic status often provides resources and stability that support healthy sleep, so it is also unlikely to be linked to sleep problems.
5. Step 5: Note that parental depression has been consistently linked in research to infant sleep problems, as parental mental health can affect caregiving behaviors and the infant's sleep environment.