A Social Smile Differs from a Reflexive Smile in That

question 15

Multiple Choice

A social smile differs from a reflexive smile in that a social smile

• A) occurs in response to an external stimulus.
• B) is first observed beyond the age of 12 months.
• C) occurs only when the infant is asleep.
• D) usually occurs when a child meets unfamiliar adults outside the home environment.

Comprehend the significance of control groups in experimental research and how their absence can affect study conclusions.

Differentiate between experimental and correlational studies.

Understand the concepts and roles of independent and dependent variables in research.

Identify how random assignment contributes to the reliability of experiment outcomes.

---

Definitions:

Developed Nations

Countries that have a high level of economic growth and security, advanced technological infrastructure, and a high standard of living.

Middle Adulthood

A period in human development typically ranging from ages 40 to 65, focused on personal and professional growth, and stability.

Parenthood

The duties and state of being a parent, encompassing the upbringing, education, and care of children.

Primary Caregiver

An individual who takes primary responsibility for someone who cannot care fully for themselves, such as a parent for a child or an adult for an aging parent.