____ make observations of the same people over time.Multiple choice question.Double-blind studiesMeta-analysis designsLongitudinal designsCorrelational designs

The correct answer is Longitudinal designs.

Explanation

Longitudinal designs involve making observations of the same subjects over a period of time, allowing researchers to track changes and development within the same individuals. This approach is particularly useful for studying developmental trends, behavioral changes, and long-term effects of various interventions.

Other Options:

1. Double-blind studies: These are experimental designs where neither the participants nor the researchers know who is receiving a particular treatment, used primarily to prevent bias.
2. Meta-analysis designs: This involves combining results from multiple studies to identify trends or outcomes.
3. Correlational designs: These focus on determining relationships between variables but do not track the same individuals over time.

In conclusion, longitudinal designs are specifically designed for observing the same individuals repeatedly over time.