What is a single group that is followed over time to see If improvement occurs on the task being measured? Longitudinal Study Sample Population

## Step 1<br />The question is asking for the term that describes a group of individuals that is followed over time to see if there is any improvement in the task being measured. The options provided are "Longitudinal Study", "Sample", and "Population".<br /><br />## Step 2<br />A "Longitudinal Study" is a type of research design where the same subjects are studied over a long period of time. This type of study is used to observe changes in the subjects over time, which is exactly what the question is asking for.<br /><br />## Step 3<br />A "Sample" is a subset of a population that is selected to represent the entire group. It is not necessarily followed over time, so it does not fit the description given in the question.<br /><br />## Step 4<br />A "Population" refers to the entire group that is being studied. It is not a group that is followed over time, so it also does not fit the description given in the question.