AP PSYCHOLOGY

Detailed explanation-1: -So, once again, researchers do not interfere with their subjects. However, in a longitudinal study, researchers conduct several observations of the same subjects over a period of time, sometimes lasting many years.

Detailed explanation-2: -A longitudinal study (or longitudinal survey, or panel study) is a research design that involves repeated observations of the same variables (e.g., people) over short or long periods of time (i.e., uses longitudinal data).

Detailed explanation-3: -(LON-jih-TOO-dih-nul KOH-hort STUH-dee) A type of research study that follows large groups of people over a long time. The groups are alike in many ways but differ by a certain characteristic (for example, female nurses who smoke and those who do not smoke).

Detailed explanation-4: -There are a range of different types of longitudinal studies: cohort studies, panel studies, record linkage studies.

Detailed explanation-5: -Longitudinal studies differ from one-off, or cross-sectional, studies. The main difference is that cross-sectional studies interview a fresh sample of people each time they are carried out, whereas longitudinal studies follow the same sample of people over time.