A Study of Obesity Risk in Children in a Head

question 29

Multiple Choice

A study of obesity risk in children in a head start program used a food score calculated from a 45-question food survey to predict body mass index (BMI) percentile in these children 18 months after the initial survey. The study enrolled 20 children. The researchers used a linear regression model for the prediction of BMI percentile. The food scores ranged from 45 to 245. A regression model has:

• A)one unknown parameter to be estimated.
• B)two unknown parameters to be estimated.
• C)three unknown parameters to be estimated.
• D)four unknown parameters to be estimated.

Differentiate between true experimental designs and quasi-experimental designs in the context of studying developmental changes.

Grasp the concept of interrupted time series design and its relevance in evaluating the impact of societal or policy changes over time.

Understand the application of developmental research methods in real-world situations, such as policy changes and educational studies.

Appreciate the complexities involved in measuring developmental changes and the importance of choosing an appropriate research design.

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Definitions:

Stimulus

Any event or situation that evokes a response from an organism.

Rote Repetition

A memorization technique based on the repeated reading or recitation of material.

State-dependent Memory

State-dependent memory is the phenomenon where information learned in a particular state of mind (e.g., emotional or physical) is more easily recalled when in the same state.

Emotional State

A complex experience of consciousness, bodily sensation, and behavior that reflects the personal significance of a thing, an event, or a state of affairs.