Dr. Samuelson wants to study the impact of social media on the friendships of 20-, 40-, 60-, and 80-year-olds. He plans to follow each age group for 10 years and study their use of social media and their relationships. What type of study is Dr. Samuelson conducting? A. Longitudinal study.
B. Cross-sequential study.
C. Normative study.
D. Cross-sectional study.

Dr. Samuelson is conducting a B. Cross-sequential study.

Explanation:

A Cross-sequential study is a mixture of the longitudinal and cross-sectional study.

Let's break them both down:

Thus, a cross-sequential study observes its various types of subjects through a long period of time.

It can be seen in this example: Dr. Samuelson's plan is to follow various subjects of different ages over 10 years in order to observe their use of social media and relationships.

propioception;

answer; evidence; reverseremand;